From 3e56a631620ccac6268e756f56b855314243347f Mon Sep 17 00:00:00 2001
From: Hypolite Petovan <mrpetovan@gmail.com>
Date: Sun, 14 Jan 2018 10:06:12 -0500
Subject: [PATCH] Remove library/php-markdown

---
 library/markdown.php                          |    5 +-
 library/php-markdown/License.md               |   36 -
 library/php-markdown/Michelf/Markdown.inc.php |   10 -
 library/php-markdown/Michelf/Markdown.php     | 1896 -----------------
 .../Michelf/MarkdownExtra.inc.php             |   11 -
 .../php-markdown/Michelf/MarkdownExtra.php    | 1785 ----------------
 .../Michelf/MarkdownInterface.inc.php         |    9 -
 .../Michelf/MarkdownInterface.php             |   38 -
 library/php-markdown/Readme.md                |  384 ----
 library/php-markdown/Readme.php               |   31 -
 library/php-markdown/composer.json            |   26 -
 11 files changed, 2 insertions(+), 4229 deletions(-)
 delete mode 100644 library/php-markdown/License.md
 delete mode 100644 library/php-markdown/Michelf/Markdown.inc.php
 delete mode 100644 library/php-markdown/Michelf/Markdown.php
 delete mode 100644 library/php-markdown/Michelf/MarkdownExtra.inc.php
 delete mode 100644 library/php-markdown/Michelf/MarkdownExtra.php
 delete mode 100644 library/php-markdown/Michelf/MarkdownInterface.inc.php
 delete mode 100644 library/php-markdown/Michelf/MarkdownInterface.php
 delete mode 100644 library/php-markdown/Readme.md
 delete mode 100644 library/php-markdown/Readme.php
 delete mode 100644 library/php-markdown/composer.json

diff --git a/library/markdown.php b/library/markdown.php
index 8def53fcb..308d91bc7 100644
--- a/library/markdown.php
+++ b/library/markdown.php
@@ -6,14 +6,13 @@
  * @brief Parser for Markdown files
  */
 
-require_once "library/php-markdown/Michelf/MarkdownExtra.inc.php";
 use \Michelf\MarkdownExtra;
 
 /**
  * @brief This function parses a text using php-markdown library to render Markdown syntax to HTML
  *
- * This function is using the php-markdown library by Michel Fortin to parse a 
- * string ($text).It returns the rendered HTML code from that text. The optional 
+ * This function is using the php-markdown library by Michel Fortin to parse a
+ * string ($text).It returns the rendered HTML code from that text. The optional
  * $hardwrap parameter is used to switch between inserting hard breaks after
  * every linefeed, which is required for Diaspora compatibility, or not. The
  * later is used for parsing documentation and README.md files.
diff --git a/library/php-markdown/License.md b/library/php-markdown/License.md
deleted file mode 100644
index c16197b69..000000000
--- a/library/php-markdown/License.md
+++ /dev/null
@@ -1,36 +0,0 @@
-PHP Markdown Lib  
-Copyright (c) 2004-2016 Michel Fortin  
-<https://michelf.ca/>  
-All rights reserved.
-
-Based on Markdown  
-Copyright (c) 2003-2006 John Gruber   
-<https://daringfireball.net/>   
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-* Redistributions of source code must retain the above copyright notice,
-  this list of conditions and the following disclaimer.
-
-* Redistributions in binary form must reproduce the above copyright
-  notice, this list of conditions and the following disclaimer in the
-  documentation and/or other materials provided with the distribution.
-
-* Neither the name "Markdown" nor the names of its contributors may
-  be used to endorse or promote products derived from this software
-  without specific prior written permission.
-
-This software is provided by the copyright holders and contributors "as
-is" and any express or implied warranties, including, but not limited
-to, the implied warranties of merchantability and fitness for a
-particular purpose are disclaimed. In no event shall the copyright owner
-or contributors be liable for any direct, indirect, incidental, special,
-exemplary, or consequential damages (including, but not limited to,
-procurement of substitute goods or services; loss of use, data, or
-profits; or business interruption) however caused and on any theory of
-liability, whether in contract, strict liability, or tort (including
-negligence or otherwise) arising in any way out of the use of this
-software, even if advised of the possibility of such damage.
diff --git a/library/php-markdown/Michelf/Markdown.inc.php b/library/php-markdown/Michelf/Markdown.inc.php
deleted file mode 100644
index e2bd3808e..000000000
--- a/library/php-markdown/Michelf/Markdown.inc.php
+++ /dev/null
@@ -1,10 +0,0 @@
-<?php
-
-// Use this file if you cannot use class autoloading. It will include all the
-// files needed for the Markdown parser.
-//
-// Take a look at the PSR-0-compatible class autoloading implementation
-// in the Readme.php file if you want a simple autoloader setup.
-
-require_once dirname(__FILE__) . '/MarkdownInterface.php';
-require_once dirname(__FILE__) . '/Markdown.php';
diff --git a/library/php-markdown/Michelf/Markdown.php b/library/php-markdown/Michelf/Markdown.php
deleted file mode 100644
index 04577298a..000000000
--- a/library/php-markdown/Michelf/Markdown.php
+++ /dev/null
@@ -1,1896 +0,0 @@
-<?php
-/**
- * Markdown  -  A text-to-HTML conversion tool for web writers
- *
- * @package   php-markdown
- * @author    Michel Fortin <michel.fortin@michelf.com>
- * @copyright 2004-2016 Michel Fortin <https://michelf.com/projects/php-markdown/>
- * @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
- */
-
-namespace Michelf;
-
-/**
- * Markdown Parser Class
- */
-class Markdown implements MarkdownInterface {
-	/**
-	 * Define the package version
-	 * @var string
-	 */
-	const MARKDOWNLIB_VERSION = "1.7.0";
-
-	/**
-	 * Simple function interface - Initialize the parser and return the result
-	 * of its transform method. This will work fine for derived classes too.
-	 *
-	 * @api
-	 *
-	 * @param  string $text
-	 * @return string
-	 */
-	public static function defaultTransform($text) {
-		// Take parser class on which this function was called.
-		$parser_class = \get_called_class();
-
-		// Try to take parser from the static parser list
-		static $parser_list;
-		$parser =& $parser_list[$parser_class];
-
-		// Create the parser it not already set
-		if (!$parser) {
-			$parser = new $parser_class;
-		}
-
-		// Transform text using parser.
-		return $parser->transform($text);
-	}
-
-	/**
-	 * Configuration variables
-	 */
-
-	/**
-	 * Change to ">" for HTML output.
-	 * @var string
-	 */
-	public $empty_element_suffix = " />";
-
-	/**
-	 * The width of indentation of the output markup
-	 * @var int
-	 */
-	public $tab_width = 4;
-
-	/**
-	 * Change to `true` to disallow markup or entities.
-	 * @var boolean
-	 */
-	public $no_markup   = false;
-	public $no_entities = false;
-
-
-	/**
-	 * Change to `true` to enable line breaks on \n without two trailling spaces
-	 * @var boolean
-	 */
-	public $hard_wrap = false;
-
-	/**
-	 * Predefined URLs and titles for reference links and images.
-	 * @var array
-	 */
-	public $predef_urls   = array();
-	public $predef_titles = array();
-
-	/**
-	 * Optional filter function for URLs
-	 * @var callable
-	 */
-	public $url_filter_func = null;
-
-	/**
-	 * Optional header id="" generation callback function.
-	 * @var callable
-	 */
-	public $header_id_func = null;
-
-	/**
-	 * Optional function for converting code block content to HTML
-	 * @var callable
-	 */
-	public $code_block_content_func = null;
-
-	/**
-	 * Optional function for converting code span content to HTML.
-	 * @var callable
-	 */
-	public $code_span_content_func = null;
-
-	/**
-	 * Class attribute to toggle "enhanced ordered list" behaviour
-	 * setting this to true will allow ordered lists to start from the index
-	 * number that is defined first.
-	 *
-	 * For example:
-	 * 2. List item two
-	 * 3. List item three
-	 *
-	 * Becomes:
-	 * <ol start="2">
-	 * <li>List item two</li>
-	 * <li>List item three</li>
-	 * </ol>
-	 *
-	 * @var bool
-	 */
-	public $enhanced_ordered_list = false;
-
-	/**
-	 * Parser implementation
-	 */
-
-	/**
-	 * Regex to match balanced [brackets].
-	 * Needed to insert a maximum bracked depth while converting to PHP.
-	 * @var int
-	 */
-	protected $nested_brackets_depth = 6;
-	protected $nested_brackets_re;
-
-	protected $nested_url_parenthesis_depth = 4;
-	protected $nested_url_parenthesis_re;
-
-	/**
-	 * Table of hash values for escaped characters:
-	 * @var string
-	 */
-	protected $escape_chars = '\`*_{}[]()>#+-.!';
-	protected $escape_chars_re;
-
-	/**
-	 * Constructor function. Initialize appropriate member variables.
-	 * @return void
-	 */
-	public function __construct() {
-		$this->_initDetab();
-		$this->prepareItalicsAndBold();
-
-		$this->nested_brackets_re =
-			str_repeat('(?>[^\[\]]+|\[', $this->nested_brackets_depth).
-			str_repeat('\])*', $this->nested_brackets_depth);
-
-		$this->nested_url_parenthesis_re =
-			str_repeat('(?>[^()\s]+|\(', $this->nested_url_parenthesis_depth).
-			str_repeat('(?>\)))*', $this->nested_url_parenthesis_depth);
-
-		$this->escape_chars_re = '['.preg_quote($this->escape_chars).']';
-
-		// Sort document, block, and span gamut in ascendent priority order.
-		asort($this->document_gamut);
-		asort($this->block_gamut);
-		asort($this->span_gamut);
-	}
-
-
-	/**
-	 * Internal hashes used during transformation.
-	 * @var array
-	 */
-	protected $urls        = array();
-	protected $titles      = array();
-	protected $html_hashes = array();
-
-	/**
-	 * Status flag to avoid invalid nesting.
-	 * @var boolean
-	 */
-	protected $in_anchor = false;
-
-	/**
-	 * Called before the transformation process starts to setup parser states.
-	 * @return void
-	 */
-	protected function setup() {
-		// Clear global hashes.
-		$this->urls        = $this->predef_urls;
-		$this->titles      = $this->predef_titles;
-		$this->html_hashes = array();
-		$this->in_anchor   = false;
-	}
-
-	/**
-	 * Called after the transformation process to clear any variable which may
-	 * be taking up memory unnecessarly.
-	 * @return void
-	 */
-	protected function teardown() {
-		$this->urls        = array();
-		$this->titles      = array();
-		$this->html_hashes = array();
-	}
-
-	/**
-	 * Main function. Performs some preprocessing on the input text and pass
-	 * it through the document gamut.
-	 *
-	 * @api
-	 *
-	 * @param  string $text
-	 * @return string
-	 */
-	public function transform($text) {
-		$this->setup();
-
-		# Remove UTF-8 BOM and marker character in input, if present.
-		$text = preg_replace('{^\xEF\xBB\xBF|\x1A}', '', $text);
-
-		# Standardize line endings:
-		#   DOS to Unix and Mac to Unix
-		$text = preg_replace('{\r\n?}', "\n", $text);
-
-		# Make sure $text ends with a couple of newlines:
-		$text .= "\n\n";
-
-		# Convert all tabs to spaces.
-		$text = $this->detab($text);
-
-		# Turn block-level HTML blocks into hash entries
-		$text = $this->hashHTMLBlocks($text);
-
-		# Strip any lines consisting only of spaces and tabs.
-		# This makes subsequent regexen easier to write, because we can
-		# match consecutive blank lines with /\n+/ instead of something
-		# contorted like /[ ]*\n+/ .
-		$text = preg_replace('/^[ ]+$/m', '', $text);
-
-		# Run document gamut methods.
-		foreach ($this->document_gamut as $method => $priority) {
-			$text = $this->$method($text);
-		}
-
-		$this->teardown();
-
-		return $text . "\n";
-	}
-
-	/**
-	 * Define the document gamut
-	 * @var array
-	 */
-	protected $document_gamut = array(
-		// Strip link definitions, store in hashes.
-		"stripLinkDefinitions" => 20,
-		"runBasicBlockGamut"   => 30,
-	);
-
-	/**
-	 * Strips link definitions from text, stores the URLs and titles in
-	 * hash references
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function stripLinkDefinitions($text) {
-
-		$less_than_tab = $this->tab_width - 1;
-
-		// Link defs are in the form: ^[id]: url "optional title"
-		$text = preg_replace_callback('{
-							^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?:	# id = $1
-							  [ ]*
-							  \n?				# maybe *one* newline
-							  [ ]*
-							(?:
-							  <(.+?)>			# url = $2
-							|
-							  (\S+?)			# url = $3
-							)
-							  [ ]*
-							  \n?				# maybe one newline
-							  [ ]*
-							(?:
-								(?<=\s)			# lookbehind for whitespace
-								["(]
-								(.*?)			# title = $4
-								[")]
-								[ ]*
-							)?	# title is optional
-							(?:\n+|\Z)
-			}xm',
-			array($this, '_stripLinkDefinitions_callback'),
-			$text
-		);
-		return $text;
-	}
-
-	/**
-	 * The callback to strip link definitions
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _stripLinkDefinitions_callback($matches) {
-		$link_id = strtolower($matches[1]);
-		$url = $matches[2] == '' ? $matches[3] : $matches[2];
-		$this->urls[$link_id] = $url;
-		$this->titles[$link_id] =& $matches[4];
-		return ''; // String that will replace the block
-	}
-
-	/**
-	 * Hashify HTML blocks
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function hashHTMLBlocks($text) {
-		if ($this->no_markup) {
-			return $text;
-		}
-
-		$less_than_tab = $this->tab_width - 1;
-
-		/**
-		 * Hashify HTML blocks:
-		 *
-		 * We only want to do this for block-level HTML tags, such as headers,
-		 * lists, and tables. That's because we still want to wrap <p>s around
-		 * "paragraphs" that are wrapped in non-block-level tags, such as
-		 * anchors, phrase emphasis, and spans. The list of tags we're looking
-		 * for is hard-coded:
-		 *
-		 * *  List "a" is made of tags which can be both inline or block-level.
-		 *    These will be treated block-level when the start tag is alone on
-		 *    its line, otherwise they're not matched here and will be taken as
-		 *    inline later.
-		 * *  List "b" is made of tags which are always block-level;
-		 */
-		$block_tags_a_re = 'ins|del';
-		$block_tags_b_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|'.
-						   'script|noscript|style|form|fieldset|iframe|math|svg|'.
-						   'article|section|nav|aside|hgroup|header|footer|'.
-						   'figure';
-
-		// Regular expression for the content of a block tag.
-		$nested_tags_level = 4;
-		$attr = '
-			(?>				# optional tag attributes
-			  \s			# starts with whitespace
-			  (?>
-				[^>"/]+		# text outside quotes
-			  |
-				/+(?!>)		# slash not followed by ">"
-			  |
-				"[^"]*"		# text inside double quotes (tolerate ">")
-			  |
-				\'[^\']*\'	# text inside single quotes (tolerate ">")
-			  )*
-			)?
-			';
-		$content =
-			str_repeat('
-				(?>
-				  [^<]+			# content without tag
-				|
-				  <\2			# nested opening tag
-					'.$attr.'	# attributes
-					(?>
-					  />
-					|
-					  >', $nested_tags_level).	// end of opening tag
-					  '.*?'.					// last level nested tag content
-			str_repeat('
-					  </\2\s*>	# closing nested tag
-					)
-				  |
-					<(?!/\2\s*>	# other tags with a different name
-				  )
-				)*',
-				$nested_tags_level);
-		$content2 = str_replace('\2', '\3', $content);
-
-		/**
-		 * First, look for nested blocks, e.g.:
-		 * 	<div>
-		 * 		<div>
-		 * 		tags for inner block must be indented.
-		 * 		</div>
-		 * 	</div>
-		 *
-		 * The outermost tags must start at the left margin for this to match,
-		 * and the inner nested divs must be indented.
-		 * We need to do this before the next, more liberal match, because the
-		 * next match will start at the first `<div>` and stop at the
-		 * first `</div>`.
-		 */
-		$text = preg_replace_callback('{(?>
-			(?>
-				(?<=\n)			# Starting on its own line
-				|				# or
-				\A\n?			# the at beginning of the doc
-			)
-			(						# save in $1
-
-			  # Match from `\n<tag>` to `</tag>\n`, handling nested tags
-			  # in between.
-
-						[ ]{0,'.$less_than_tab.'}
-						<('.$block_tags_b_re.')# start tag = $2
-						'.$attr.'>			# attributes followed by > and \n
-						'.$content.'		# content, support nesting
-						</\2>				# the matching end tag
-						[ ]*				# trailing spaces/tabs
-						(?=\n+|\Z)	# followed by a newline or end of document
-
-			| # Special version for tags of group a.
-
-						[ ]{0,'.$less_than_tab.'}
-						<('.$block_tags_a_re.')# start tag = $3
-						'.$attr.'>[ ]*\n	# attributes followed by >
-						'.$content2.'		# content, support nesting
-						</\3>				# the matching end tag
-						[ ]*				# trailing spaces/tabs
-						(?=\n+|\Z)	# followed by a newline or end of document
-
-			| # Special case just for <hr />. It was easier to make a special
-			  # case than to make the other regex more complicated.
-
-						[ ]{0,'.$less_than_tab.'}
-						<(hr)				# start tag = $2
-						'.$attr.'			# attributes
-						/?>					# the matching end tag
-						[ ]*
-						(?=\n{2,}|\Z)		# followed by a blank line or end of document
-
-			| # Special case for standalone HTML comments:
-
-					[ ]{0,'.$less_than_tab.'}
-					(?s:
-						<!-- .*? -->
-					)
-					[ ]*
-					(?=\n{2,}|\Z)		# followed by a blank line or end of document
-
-			| # PHP and ASP-style processor instructions (<? and <%)
-
-					[ ]{0,'.$less_than_tab.'}
-					(?s:
-						<([?%])			# $2
-						.*?
-						\2>
-					)
-					[ ]*
-					(?=\n{2,}|\Z)		# followed by a blank line or end of document
-
-			)
-			)}Sxmi',
-			array($this, '_hashHTMLBlocks_callback'),
-			$text
-		);
-
-		return $text;
-	}
-
-	/**
-	 * The callback for hashing HTML blocks
-	 * @param  string $matches
-	 * @return string
-	 */
-	protected function _hashHTMLBlocks_callback($matches) {
-		$text = $matches[1];
-		$key  = $this->hashBlock($text);
-		return "\n\n$key\n\n";
-	}
-
-	/**
-	 * Called whenever a tag must be hashed when a function insert an atomic
-	 * element in the text stream. Passing $text to through this function gives
-	 * a unique text-token which will be reverted back when calling unhash.
-	 *
-	 * The $boundary argument specify what character should be used to surround
-	 * the token. By convension, "B" is used for block elements that needs not
-	 * to be wrapped into paragraph tags at the end, ":" is used for elements
-	 * that are word separators and "X" is used in the general case.
-	 *
-	 * @param  string $text
-	 * @param  string $boundary
-	 * @return string
-	 */
-	protected function hashPart($text, $boundary = 'X') {
-		// Swap back any tag hash found in $text so we do not have to `unhash`
-		// multiple times at the end.
-		$text = $this->unhash($text);
-
-		// Then hash the block.
-		static $i = 0;
-		$key = "$boundary\x1A" . ++$i . $boundary;
-		$this->html_hashes[$key] = $text;
-		return $key; // String that will replace the tag.
-	}
-
-	/**
-	 * Shortcut function for hashPart with block-level boundaries.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function hashBlock($text) {
-		return $this->hashPart($text, 'B');
-	}
-
-	/**
-	 * Define the block gamut - these are all the transformations that form
-	 * block-level tags like paragraphs, headers, and list items.
-	 * @var array
-	 */
-	protected $block_gamut = array(
-		"doHeaders"         => 10,
-		"doHorizontalRules" => 20,
-		"doLists"           => 40,
-		"doCodeBlocks"      => 50,
-		"doBlockQuotes"     => 60,
-	);
-
-	/**
-	 * Run block gamut tranformations.
-	 *
-	 * We need to escape raw HTML in Markdown source before doing anything
-	 * else. This need to be done for each block, and not only at the
-	 * begining in the Markdown function since hashed blocks can be part of
-	 * list items and could have been indented. Indented blocks would have
-	 * been seen as a code block in a previous pass of hashHTMLBlocks.
-	 *
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function runBlockGamut($text) {
-		$text = $this->hashHTMLBlocks($text);
-		return $this->runBasicBlockGamut($text);
-	}
-
-	/**
-	 * Run block gamut tranformations, without hashing HTML blocks. This is
-	 * useful when HTML blocks are known to be already hashed, like in the first
-	 * whole-document pass.
-	 *
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function runBasicBlockGamut($text) {
-
-		foreach ($this->block_gamut as $method => $priority) {
-			$text = $this->$method($text);
-		}
-
-		// Finally form paragraph and restore hashed blocks.
-		$text = $this->formParagraphs($text);
-
-		return $text;
-	}
-
-	/**
-	 * Convert horizontal rules
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doHorizontalRules($text) {
-		return preg_replace(
-			'{
-				^[ ]{0,3}	# Leading space
-				([-*_])		# $1: First marker
-				(?>			# Repeated marker group
-					[ ]{0,2}	# Zero, one, or two spaces.
-					\1			# Marker character
-				){2,}		# Group repeated at least twice
-				[ ]*		# Tailing spaces
-				$			# End of line.
-			}mx',
-			"\n".$this->hashBlock("<hr$this->empty_element_suffix")."\n",
-			$text
-		);
-	}
-
-	/**
-	 * These are all the transformations that occur *within* block-level
-	 * tags like paragraphs, headers, and list items.
-	 * @var array
-	 */
-	protected $span_gamut = array(
-		// Process character escapes, code spans, and inline HTML
-		// in one shot.
-		"parseSpan"           => -30,
-		// Process anchor and image tags. Images must come first,
-		// because ![foo][f] looks like an anchor.
-		"doImages"            =>  10,
-		"doAnchors"           =>  20,
-		// Make links out of things like `<https://example.com/>`
-		// Must come after doAnchors, because you can use < and >
-		// delimiters in inline links like [this](<url>).
-		"doAutoLinks"         =>  30,
-		"encodeAmpsAndAngles" =>  40,
-		"doItalicsAndBold"    =>  50,
-		"doHardBreaks"        =>  60,
-	);
-
-	/**
-	 * Run span gamut transformations
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function runSpanGamut($text) {
-		foreach ($this->span_gamut as $method => $priority) {
-			$text = $this->$method($text);
-		}
-
-		return $text;
-	}
-
-	/**
-	 * Do hard breaks
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doHardBreaks($text) {
-		if ($this->hard_wrap) {
-			return preg_replace_callback('/ *\n/',
-				array($this, '_doHardBreaks_callback'), $text);
-		} else {
-			return preg_replace_callback('/ {2,}\n/',
-				array($this, '_doHardBreaks_callback'), $text);
-		}
-	}
-
-	/**
-	 * Trigger part hashing for the hard break (callback method)
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doHardBreaks_callback($matches) {
-		return $this->hashPart("<br$this->empty_element_suffix\n");
-	}
-
-	/**
-	 * Turn Markdown link shortcuts into XHTML <a> tags.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doAnchors($text) {
-		if ($this->in_anchor) {
-			return $text;
-		}
-		$this->in_anchor = true;
-
-		// First, handle reference-style links: [link text] [id]
-		$text = preg_replace_callback('{
-			(					# wrap whole match in $1
-			  \[
-				('.$this->nested_brackets_re.')	# link text = $2
-			  \]
-
-			  [ ]?				# one optional space
-			  (?:\n[ ]*)?		# one optional newline followed by spaces
-
-			  \[
-				(.*?)		# id = $3
-			  \]
-			)
-			}xs',
-			array($this, '_doAnchors_reference_callback'), $text);
-
-		// Next, inline-style links: [link text](url "optional title")
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  \[
-				('.$this->nested_brackets_re.')	# link text = $2
-			  \]
-			  \(			# literal paren
-				[ \n]*
-				(?:
-					<(.+?)>	# href = $3
-				|
-					('.$this->nested_url_parenthesis_re.')	# href = $4
-				)
-				[ \n]*
-				(			# $5
-				  ([\'"])	# quote char = $6
-				  (.*?)		# Title = $7
-				  \6		# matching quote
-				  [ \n]*	# ignore any spaces/tabs between closing quote and )
-				)?			# title is optional
-			  \)
-			)
-			}xs',
-			array($this, '_doAnchors_inline_callback'), $text);
-
-		// Last, handle reference-style shortcuts: [link text]
-		// These must come last in case you've also got [link text][1]
-		// or [link text](/foo)
-		$text = preg_replace_callback('{
-			(					# wrap whole match in $1
-			  \[
-				([^\[\]]+)		# link text = $2; can\'t contain [ or ]
-			  \]
-			)
-			}xs',
-			array($this, '_doAnchors_reference_callback'), $text);
-
-		$this->in_anchor = false;
-		return $text;
-	}
-
-	/**
-	 * Callback method to parse referenced anchors
-	 * @param  string $matches
-	 * @return string
-	 */
-	protected function _doAnchors_reference_callback($matches) {
-		$whole_match =  $matches[1];
-		$link_text   =  $matches[2];
-		$link_id     =& $matches[3];
-
-		if ($link_id == "") {
-			// for shortcut links like [this][] or [this].
-			$link_id = $link_text;
-		}
-
-		// lower-case and turn embedded newlines into spaces
-		$link_id = strtolower($link_id);
-		$link_id = preg_replace('{[ ]?\n}', ' ', $link_id);
-
-		if (isset($this->urls[$link_id])) {
-			$url = $this->urls[$link_id];
-			$url = $this->encodeURLAttribute($url);
-
-			$result = "<a href=\"$url\"";
-			if ( isset( $this->titles[$link_id] ) ) {
-				$title = $this->titles[$link_id];
-				$title = $this->encodeAttribute($title);
-				$result .=  " title=\"$title\"";
-			}
-
-			$link_text = $this->runSpanGamut($link_text);
-			$result .= ">$link_text</a>";
-			$result = $this->hashPart($result);
-		} else {
-			$result = $whole_match;
-		}
-		return $result;
-	}
-
-	/**
-	 * Callback method to parse inline anchors
-	 * @param  string $matches
-	 * @return string
-	 */
-	protected function _doAnchors_inline_callback($matches) {
-		$whole_match	=  $matches[1];
-		$link_text		=  $this->runSpanGamut($matches[2]);
-		$url			=  $matches[3] == '' ? $matches[4] : $matches[3];
-		$title			=& $matches[7];
-
-		// If the URL was of the form <s p a c e s> it got caught by the HTML
-		// tag parser and hashed. Need to reverse the process before using
-		// the URL.
-		$unhashed = $this->unhash($url);
-		if ($unhashed != $url)
-			$url = preg_replace('/^<(.*)>$/', '\1', $unhashed);
-
-		$url = $this->encodeURLAttribute($url);
-
-		$result = "<a href=\"$url\"";
-		if (isset($title)) {
-			$title = $this->encodeAttribute($title);
-			$result .=  " title=\"$title\"";
-		}
-
-		$link_text = $this->runSpanGamut($link_text);
-		$result .= ">$link_text</a>";
-
-		return $this->hashPart($result);
-	}
-
-	/**
-	 * Turn Markdown image shortcuts into <img> tags.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doImages($text) {
-		// First, handle reference-style labeled images: ![alt text][id]
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  !\[
-				('.$this->nested_brackets_re.')		# alt text = $2
-			  \]
-
-			  [ ]?				# one optional space
-			  (?:\n[ ]*)?		# one optional newline followed by spaces
-
-			  \[
-				(.*?)		# id = $3
-			  \]
-
-			)
-			}xs',
-			array($this, '_doImages_reference_callback'), $text);
-
-		// Next, handle inline images:  ![alt text](url "optional title")
-		// Don't forget: encode * and _
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  !\[
-				('.$this->nested_brackets_re.')		# alt text = $2
-			  \]
-			  \s?			# One optional whitespace character
-			  \(			# literal paren
-				[ \n]*
-				(?:
-					<(\S*)>	# src url = $3
-				|
-					('.$this->nested_url_parenthesis_re.')	# src url = $4
-				)
-				[ \n]*
-				(			# $5
-				  ([\'"])	# quote char = $6
-				  (.*?)		# title = $7
-				  \6		# matching quote
-				  [ \n]*
-				)?			# title is optional
-			  \)
-			)
-			}xs',
-			array($this, '_doImages_inline_callback'), $text);
-
-		return $text;
-	}
-
-	/**
-	 * Callback to parse references image tags
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doImages_reference_callback($matches) {
-		$whole_match = $matches[1];
-		$alt_text    = $matches[2];
-		$link_id     = strtolower($matches[3]);
-
-		if ($link_id == "") {
-			$link_id = strtolower($alt_text); // for shortcut links like ![this][].
-		}
-
-		$alt_text = $this->encodeAttribute($alt_text);
-		if (isset($this->urls[$link_id])) {
-			$url = $this->encodeURLAttribute($this->urls[$link_id]);
-			$result = "<img src=\"$url\" alt=\"$alt_text\"";
-			if (isset($this->titles[$link_id])) {
-				$title = $this->titles[$link_id];
-				$title = $this->encodeAttribute($title);
-				$result .=  " title=\"$title\"";
-			}
-			$result .= $this->empty_element_suffix;
-			$result = $this->hashPart($result);
-		} else {
-			// If there's no such link ID, leave intact:
-			$result = $whole_match;
-		}
-
-		return $result;
-	}
-
-	/**
-	 * Callback to parse inline image tags
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doImages_inline_callback($matches) {
-		$whole_match	= $matches[1];
-		$alt_text		= $matches[2];
-		$url			= $matches[3] == '' ? $matches[4] : $matches[3];
-		$title			=& $matches[7];
-
-		$alt_text = $this->encodeAttribute($alt_text);
-		$url = $this->encodeURLAttribute($url);
-		$result = "<img src=\"$url\" alt=\"$alt_text\"";
-		if (isset($title)) {
-			$title = $this->encodeAttribute($title);
-			$result .=  " title=\"$title\""; // $title already quoted
-		}
-		$result .= $this->empty_element_suffix;
-
-		return $this->hashPart($result);
-	}
-
-	/**
-	 * Parse Markdown heading elements to HTML
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doHeaders($text) {
-		/**
-		 * Setext-style headers:
-		 *	  Header 1
-		 *	  ========
-		 *
-		 *	  Header 2
-		 *	  --------
-		 */
-		$text = preg_replace_callback('{ ^(.+?)[ ]*\n(=+|-+)[ ]*\n+ }mx',
-			array($this, '_doHeaders_callback_setext'), $text);
-
-		/**
-		 * atx-style headers:
-		 *   # Header 1
-		 *   ## Header 2
-		 *   ## Header 2 with closing hashes ##
-		 *   ...
-		 *   ###### Header 6
-		 */
-		$text = preg_replace_callback('{
-				^(\#{1,6})	# $1 = string of #\'s
-				[ ]*
-				(.+?)		# $2 = Header text
-				[ ]*
-				\#*			# optional closing #\'s (not counted)
-				\n+
-			}xm',
-			array($this, '_doHeaders_callback_atx'), $text);
-
-		return $text;
-	}
-
-	/**
-	 * Setext header parsing callback
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doHeaders_callback_setext($matches) {
-		// Terrible hack to check we haven't found an empty list item.
-		if ($matches[2] == '-' && preg_match('{^-(?: |$)}', $matches[1])) {
-			return $matches[0];
-		}
-
-		$level = $matches[2]{0} == '=' ? 1 : 2;
-
-		// ID attribute generation
-		$idAtt = $this->_generateIdFromHeaderValue($matches[1]);
-
-		$block = "<h$level$idAtt>".$this->runSpanGamut($matches[1])."</h$level>";
-		return "\n" . $this->hashBlock($block) . "\n\n";
-	}
-
-	/**
-	 * ATX header parsing callback
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doHeaders_callback_atx($matches) {
-		// ID attribute generation
-		$idAtt = $this->_generateIdFromHeaderValue($matches[2]);
-
-		$level = strlen($matches[1]);
-		$block = "<h$level$idAtt>".$this->runSpanGamut($matches[2])."</h$level>";
-		return "\n" . $this->hashBlock($block) . "\n\n";
-	}
-
-	/**
-	 * If a header_id_func property is set, we can use it to automatically
-	 * generate an id attribute.
-	 *
-	 * This method returns a string in the form id="foo", or an empty string
-	 * otherwise.
-	 * @param  string $headerValue
-	 * @return string
-	 */
-	protected function _generateIdFromHeaderValue($headerValue) {
-		if (!is_callable($this->header_id_func)) {
-			return "";
-		}
-
-		$idValue = call_user_func($this->header_id_func, $headerValue);
-		if (!$idValue) {
-			return "";
-		}
-
-		return ' id="' . $this->encodeAttribute($idValue) . '"';
-	}
-
-	/**
-	 * Form HTML ordered (numbered) and unordered (bulleted) lists.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doLists($text) {
-		$less_than_tab = $this->tab_width - 1;
-
-		// Re-usable patterns to match list item bullets and number markers:
-		$marker_ul_re  = '[*+-]';
-		$marker_ol_re  = '\d+[\.]';
-
-		$markers_relist = array(
-			$marker_ul_re => $marker_ol_re,
-			$marker_ol_re => $marker_ul_re,
-			);
-
-		foreach ($markers_relist as $marker_re => $other_marker_re) {
-			// Re-usable pattern to match any entirel ul or ol list:
-			$whole_list_re = '
-				(								# $1 = whole list
-				  (								# $2
-					([ ]{0,'.$less_than_tab.'})	# $3 = number of spaces
-					('.$marker_re.')			# $4 = first list item marker
-					[ ]+
-				  )
-				  (?s:.+?)
-				  (								# $5
-					  \z
-					|
-					  \n{2,}
-					  (?=\S)
-					  (?!						# Negative lookahead for another list item marker
-						[ ]*
-						'.$marker_re.'[ ]+
-					  )
-					|
-					  (?=						# Lookahead for another kind of list
-					    \n
-						\3						# Must have the same indentation
-						'.$other_marker_re.'[ ]+
-					  )
-				  )
-				)
-			'; // mx
-
-			// We use a different prefix before nested lists than top-level lists.
-			//See extended comment in _ProcessListItems().
-
-			if ($this->list_level) {
-				$text = preg_replace_callback('{
-						^
-						'.$whole_list_re.'
-					}mx',
-					array($this, '_doLists_callback'), $text);
-			} else {
-				$text = preg_replace_callback('{
-						(?:(?<=\n)\n|\A\n?) # Must eat the newline
-						'.$whole_list_re.'
-					}mx',
-					array($this, '_doLists_callback'), $text);
-			}
-		}
-
-		return $text;
-	}
-
-	/**
-	 * List parsing callback
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doLists_callback($matches) {
-		// Re-usable patterns to match list item bullets and number markers:
-		$marker_ul_re  = '[*+-]';
-		$marker_ol_re  = '\d+[\.]';
-		$marker_any_re = "(?:$marker_ul_re|$marker_ol_re)";
-		$marker_ol_start_re = '[0-9]+';
-
-		$list = $matches[1];
-		$list_type = preg_match("/$marker_ul_re/", $matches[4]) ? "ul" : "ol";
-
-		$marker_any_re = ( $list_type == "ul" ? $marker_ul_re : $marker_ol_re );
-
-		$list .= "\n";
-		$result = $this->processListItems($list, $marker_any_re);
-
-		$ol_start = 1;
-		if ($this->enhanced_ordered_list) {
-			// Get the start number for ordered list.
-			if ($list_type == 'ol') {
-				$ol_start_array = array();
-				$ol_start_check = preg_match("/$marker_ol_start_re/", $matches[4], $ol_start_array);
-				if ($ol_start_check){
-					$ol_start = $ol_start_array[0];
-				}
-			}
-		}
-
-		if ($ol_start > 1 && $list_type == 'ol'){
-			$result = $this->hashBlock("<$list_type start=\"$ol_start\">\n" . $result . "</$list_type>");
-		} else {
-			$result = $this->hashBlock("<$list_type>\n" . $result . "</$list_type>");
-		}
-		return "\n". $result ."\n\n";
-	}
-
-	/**
-	 * Nesting tracker for list levels
-	 * @var integer
-	 */
-	protected $list_level = 0;
-
-	/**
-	 * Process the contents of a single ordered or unordered list, splitting it
-	 * into individual list items.
-	 * @param  string $list_str
-	 * @param  string $marker_any_re
-	 * @return string
-	 */
-	protected function processListItems($list_str, $marker_any_re) {
-		/**
-		 * The $this->list_level global keeps track of when we're inside a list.
-		 * Each time we enter a list, we increment it; when we leave a list,
-		 * we decrement. If it's zero, we're not in a list anymore.
-		 *
-		 * We do this because when we're not inside a list, we want to treat
-		 * something like this:
-		 *
-		 *		I recommend upgrading to version
-		 *		8. Oops, now this line is treated
-		 *		as a sub-list.
-		 *
-		 * As a single paragraph, despite the fact that the second line starts
-		 * with a digit-period-space sequence.
-		 *
-		 * Whereas when we're inside a list (or sub-list), that line will be
-		 * treated as the start of a sub-list. What a kludge, huh? This is
-		 * an aspect of Markdown's syntax that's hard to parse perfectly
-		 * without resorting to mind-reading. Perhaps the solution is to
-		 * change the syntax rules such that sub-lists must start with a
-		 * starting cardinal number; e.g. "1." or "a.".
-		 */
-		$this->list_level++;
-
-		// Trim trailing blank lines:
-		$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
-
-		$list_str = preg_replace_callback('{
-			(\n)?							# leading line = $1
-			(^[ ]*)							# leading whitespace = $2
-			('.$marker_any_re.'				# list marker and space = $3
-				(?:[ ]+|(?=\n))	# space only required if item is not empty
-			)
-			((?s:.*?))						# list item text   = $4
-			(?:(\n+(?=\n))|\n)				# tailing blank line = $5
-			(?= \n* (\z | \2 ('.$marker_any_re.') (?:[ ]+|(?=\n))))
-			}xm',
-			array($this, '_processListItems_callback'), $list_str);
-
-		$this->list_level--;
-		return $list_str;
-	}
-
-	/**
-	 * List item parsing callback
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _processListItems_callback($matches) {
-		$item = $matches[4];
-		$leading_line =& $matches[1];
-		$leading_space =& $matches[2];
-		$marker_space = $matches[3];
-		$tailing_blank_line =& $matches[5];
-
-		if ($leading_line || $tailing_blank_line ||
-			preg_match('/\n{2,}/', $item))
-		{
-			// Replace marker with the appropriate whitespace indentation
-			$item = $leading_space . str_repeat(' ', strlen($marker_space)) . $item;
-			$item = $this->runBlockGamut($this->outdent($item)."\n");
-		} else {
-			// Recursion for sub-lists:
-			$item = $this->doLists($this->outdent($item));
-			$item = $this->formParagraphs($item, false);
-		}
-
-		return "<li>" . $item . "</li>\n";
-	}
-
-	/**
-	 * Process Markdown `<pre><code>` blocks.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doCodeBlocks($text) {
-		$text = preg_replace_callback('{
-				(?:\n\n|\A\n?)
-				(	            # $1 = the code block -- one or more lines, starting with a space/tab
-				  (?>
-					[ ]{'.$this->tab_width.'}  # Lines must start with a tab or a tab-width of spaces
-					.*\n+
-				  )+
-				)
-				((?=^[ ]{0,'.$this->tab_width.'}\S)|\Z)	# Lookahead for non-space at line-start, or end of doc
-			}xm',
-			array($this, '_doCodeBlocks_callback'), $text);
-
-		return $text;
-	}
-
-	/**
-	 * Code block parsing callback
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doCodeBlocks_callback($matches) {
-		$codeblock = $matches[1];
-
-		$codeblock = $this->outdent($codeblock);
-		if ($this->code_block_content_func) {
-			$codeblock = call_user_func($this->code_block_content_func, $codeblock, "");
-		} else {
-			$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
-		}
-
-		# trim leading newlines and trailing newlines
-		$codeblock = preg_replace('/\A\n+|\n+\z/', '', $codeblock);
-
-		$codeblock = "<pre><code>$codeblock\n</code></pre>";
-		return "\n\n" . $this->hashBlock($codeblock) . "\n\n";
-	}
-
-	/**
-	 * Create a code span markup for $code. Called from handleSpanToken.
-	 * @param  string $code
-	 * @return string
-	 */
-	protected function makeCodeSpan($code) {
-		if ($this->code_span_content_func) {
-			$code = call_user_func($this->code_span_content_func, $code);
-		} else {
-			$code = htmlspecialchars(trim($code), ENT_NOQUOTES);
-		}
-		return $this->hashPart("<code>$code</code>");
-	}
-
-	/**
-	 * Define the emphasis operators with their regex matches
-	 * @var array
-	 */
-	protected $em_relist = array(
-		''  => '(?:(?<!\*)\*(?!\*)|(?<!_)_(?!_))(?![\.,:;]?\s)',
-		'*' => '(?<![\s*])\*(?!\*)',
-		'_' => '(?<![\s_])_(?!_)',
-	);
-
-	/**
-	 * Define the strong operators with their regex matches
-	 * @var array
-	 */
-	protected $strong_relist = array(
-		''   => '(?:(?<!\*)\*\*(?!\*)|(?<!_)__(?!_))(?![\.,:;]?\s)',
-		'**' => '(?<![\s*])\*\*(?!\*)',
-		'__' => '(?<![\s_])__(?!_)',
-	);
-
-	/**
-	 * Define the emphasis + strong operators with their regex matches
-	 * @var array
-	 */
-	protected $em_strong_relist = array(
-		''    => '(?:(?<!\*)\*\*\*(?!\*)|(?<!_)___(?!_))(?![\.,:;]?\s)',
-		'***' => '(?<![\s*])\*\*\*(?!\*)',
-		'___' => '(?<![\s_])___(?!_)',
-	);
-
-	/**
-	 * Container for prepared regular expressions
-	 * @var array
-	 */
-	protected $em_strong_prepared_relist;
-
-	/**
-	 * Prepare regular expressions for searching emphasis tokens in any
-	 * context.
-	 * @return void
-	 */
-	protected function prepareItalicsAndBold() {
-		foreach ($this->em_relist as $em => $em_re) {
-			foreach ($this->strong_relist as $strong => $strong_re) {
-				// Construct list of allowed token expressions.
-				$token_relist = array();
-				if (isset($this->em_strong_relist["$em$strong"])) {
-					$token_relist[] = $this->em_strong_relist["$em$strong"];
-				}
-				$token_relist[] = $em_re;
-				$token_relist[] = $strong_re;
-
-				// Construct master expression from list.
-				$token_re = '{(' . implode('|', $token_relist) . ')}';
-				$this->em_strong_prepared_relist["$em$strong"] = $token_re;
-			}
-		}
-	}
-
-	/**
-	 * Convert Markdown italics (emphasis) and bold (strong) to HTML
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doItalicsAndBold($text) {
-		$token_stack = array('');
-		$text_stack = array('');
-		$em = '';
-		$strong = '';
-		$tree_char_em = false;
-
-		while (1) {
-			// Get prepared regular expression for seraching emphasis tokens
-			// in current context.
-			$token_re = $this->em_strong_prepared_relist["$em$strong"];
-
-			// Each loop iteration search for the next emphasis token.
-			// Each token is then passed to handleSpanToken.
-			$parts = preg_split($token_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE);
-			$text_stack[0] .= $parts[0];
-			$token =& $parts[1];
-			$text =& $parts[2];
-
-			if (empty($token)) {
-				// Reached end of text span: empty stack without emitting.
-				// any more emphasis.
-				while ($token_stack[0]) {
-					$text_stack[1] .= array_shift($token_stack);
-					$text_stack[0] .= array_shift($text_stack);
-				}
-				break;
-			}
-
-			$token_len = strlen($token);
-			if ($tree_char_em) {
-				// Reached closing marker while inside a three-char emphasis.
-				if ($token_len == 3) {
-					// Three-char closing marker, close em and strong.
-					array_shift($token_stack);
-					$span = array_shift($text_stack);
-					$span = $this->runSpanGamut($span);
-					$span = "<strong><em>$span</em></strong>";
-					$text_stack[0] .= $this->hashPart($span);
-					$em = '';
-					$strong = '';
-				} else {
-					// Other closing marker: close one em or strong and
-					// change current token state to match the other
-					$token_stack[0] = str_repeat($token{0}, 3-$token_len);
-					$tag = $token_len == 2 ? "strong" : "em";
-					$span = $text_stack[0];
-					$span = $this->runSpanGamut($span);
-					$span = "<$tag>$span</$tag>";
-					$text_stack[0] = $this->hashPart($span);
-					$$tag = ''; // $$tag stands for $em or $strong
-				}
-				$tree_char_em = false;
-			} else if ($token_len == 3) {
-				if ($em) {
-					// Reached closing marker for both em and strong.
-					// Closing strong marker:
-					for ($i = 0; $i < 2; ++$i) {
-						$shifted_token = array_shift($token_stack);
-						$tag = strlen($shifted_token) == 2 ? "strong" : "em";
-						$span = array_shift($text_stack);
-						$span = $this->runSpanGamut($span);
-						$span = "<$tag>$span</$tag>";
-						$text_stack[0] .= $this->hashPart($span);
-						$$tag = ''; // $$tag stands for $em or $strong
-					}
-				} else {
-					// Reached opening three-char emphasis marker. Push on token
-					// stack; will be handled by the special condition above.
-					$em = $token{0};
-					$strong = "$em$em";
-					array_unshift($token_stack, $token);
-					array_unshift($text_stack, '');
-					$tree_char_em = true;
-				}
-			} else if ($token_len == 2) {
-				if ($strong) {
-					// Unwind any dangling emphasis marker:
-					if (strlen($token_stack[0]) == 1) {
-						$text_stack[1] .= array_shift($token_stack);
-						$text_stack[0] .= array_shift($text_stack);
-					}
-					// Closing strong marker:
-					array_shift($token_stack);
-					$span = array_shift($text_stack);
-					$span = $this->runSpanGamut($span);
-					$span = "<strong>$span</strong>";
-					$text_stack[0] .= $this->hashPart($span);
-					$strong = '';
-				} else {
-					array_unshift($token_stack, $token);
-					array_unshift($text_stack, '');
-					$strong = $token;
-				}
-			} else {
-				// Here $token_len == 1
-				if ($em) {
-					if (strlen($token_stack[0]) == 1) {
-						// Closing emphasis marker:
-						array_shift($token_stack);
-						$span = array_shift($text_stack);
-						$span = $this->runSpanGamut($span);
-						$span = "<em>$span</em>";
-						$text_stack[0] .= $this->hashPart($span);
-						$em = '';
-					} else {
-						$text_stack[0] .= $token;
-					}
-				} else {
-					array_unshift($token_stack, $token);
-					array_unshift($text_stack, '');
-					$em = $token;
-				}
-			}
-		}
-		return $text_stack[0];
-	}
-
-	/**
-	 * Parse Markdown blockquotes to HTML
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doBlockQuotes($text) {
-		$text = preg_replace_callback('/
-			  (								# Wrap whole match in $1
-				(?>
-				  ^[ ]*>[ ]?			# ">" at the start of a line
-					.+\n					# rest of the first line
-				  (.+\n)*					# subsequent consecutive lines
-				  \n*						# blanks
-				)+
-			  )
-			/xm',
-			array($this, '_doBlockQuotes_callback'), $text);
-
-		return $text;
-	}
-
-	/**
-	 * Blockquote parsing callback
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doBlockQuotes_callback($matches) {
-		$bq = $matches[1];
-		// trim one level of quoting - trim whitespace-only lines
-		$bq = preg_replace('/^[ ]*>[ ]?|^[ ]+$/m', '', $bq);
-		$bq = $this->runBlockGamut($bq); // recurse
-
-		$bq = preg_replace('/^/m', "  ", $bq);
-		// These leading spaces cause problem with <pre> content,
-		// so we need to fix that:
-		$bq = preg_replace_callback('{(\s*<pre>.+?</pre>)}sx',
-			array($this, '_doBlockQuotes_callback2'), $bq);
-
-		return "\n" . $this->hashBlock("<blockquote>\n$bq\n</blockquote>") . "\n\n";
-	}
-
-	/**
-	 * Blockquote parsing callback
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doBlockQuotes_callback2($matches) {
-		$pre = $matches[1];
-		$pre = preg_replace('/^  /m', '', $pre);
-		return $pre;
-	}
-
-	/**
-	 * Parse paragraphs
-	 *
-	 * @param  string $text String to process in paragraphs
-	 * @param  boolean $wrap_in_p Whether paragraphs should be wrapped in <p> tags
-	 * @return string
-	 */
-	protected function formParagraphs($text, $wrap_in_p = true) {
-		// Strip leading and trailing lines:
-		$text = preg_replace('/\A\n+|\n+\z/', '', $text);
-
-		$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
-
-		// Wrap <p> tags and unhashify HTML blocks
-		foreach ($grafs as $key => $value) {
-			if (!preg_match('/^B\x1A[0-9]+B$/', $value)) {
-				// Is a paragraph.
-				$value = $this->runSpanGamut($value);
-				if ($wrap_in_p) {
-					$value = preg_replace('/^([ ]*)/', "<p>", $value);
-					$value .= "</p>";
-				}
-				$grafs[$key] = $this->unhash($value);
-			} else {
-				// Is a block.
-				// Modify elements of @grafs in-place...
-				$graf = $value;
-				$block = $this->html_hashes[$graf];
-				$graf = $block;
-//				if (preg_match('{
-//					\A
-//					(							# $1 = <div> tag
-//					  <div  \s+
-//					  [^>]*
-//					  \b
-//					  markdown\s*=\s*  ([\'"])	#	$2 = attr quote char
-//					  1
-//					  \2
-//					  [^>]*
-//					  >
-//					)
-//					(							# $3 = contents
-//					.*
-//					)
-//					(</div>)					# $4 = closing tag
-//					\z
-//					}xs', $block, $matches))
-//				{
-//					list(, $div_open, , $div_content, $div_close) = $matches;
-//
-//					// We can't call Markdown(), because that resets the hash;
-//					// that initialization code should be pulled into its own sub, though.
-//					$div_content = $this->hashHTMLBlocks($div_content);
-//
-//					// Run document gamut methods on the content.
-//					foreach ($this->document_gamut as $method => $priority) {
-//						$div_content = $this->$method($div_content);
-//					}
-//
-//					$div_open = preg_replace(
-//						'{\smarkdown\s*=\s*([\'"]).+?\1}', '', $div_open);
-//
-//					$graf = $div_open . "\n" . $div_content . "\n" . $div_close;
-//				}
-				$grafs[$key] = $graf;
-			}
-		}
-
-		return implode("\n\n", $grafs);
-	}
-
-	/**
-	 * Encode text for a double-quoted HTML attribute. This function
-	 * is *not* suitable for attributes enclosed in single quotes.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function encodeAttribute($text) {
-		$text = $this->encodeAmpsAndAngles($text);
-		$text = str_replace('"', '&quot;', $text);
-		return $text;
-	}
-
-	/**
-	 * Encode text for a double-quoted HTML attribute containing a URL,
-	 * applying the URL filter if set. Also generates the textual
-	 * representation for the URL (removing mailto: or tel:) storing it in $text.
-	 * This function is *not* suitable for attributes enclosed in single quotes.
-	 *
-	 * @param  string $url
-	 * @param  string &$text Passed by reference
-	 * @return string        URL
-	 */
-	protected function encodeURLAttribute($url, &$text = null) {
-		if ($this->url_filter_func) {
-			$url = call_user_func($this->url_filter_func, $url);
-		}
-
-		if (preg_match('{^mailto:}i', $url)) {
-			$url = $this->encodeEntityObfuscatedAttribute($url, $text, 7);
-		} else if (preg_match('{^tel:}i', $url)) {
-			$url = $this->encodeAttribute($url);
-			$text = substr($url, 4);
-		} else {
-			$url = $this->encodeAttribute($url);
-			$text = $url;
-		}
-
-		return $url;
-	}
-
-	/**
-	 * Smart processing for ampersands and angle brackets that need to
-	 * be encoded. Valid character entities are left alone unless the
-	 * no-entities mode is set.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function encodeAmpsAndAngles($text) {
-		if ($this->no_entities) {
-			$text = str_replace('&', '&amp;', $text);
-		} else {
-			// Ampersand-encoding based entirely on Nat Irons's Amputator
-			// MT plugin: <http://bumppo.net/projects/amputator/>
-			$text = preg_replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/',
-								'&amp;', $text);
-		}
-		// Encode remaining <'s
-		$text = str_replace('<', '&lt;', $text);
-
-		return $text;
-	}
-
-	/**
-	 * Parse Markdown automatic links to anchor HTML tags
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doAutoLinks($text) {
-		$text = preg_replace_callback('{<((https?|ftp|dict|tel):[^\'">\s]+)>}i',
-			array($this, '_doAutoLinks_url_callback'), $text);
-
-		// Email addresses: <address@domain.foo>
-		$text = preg_replace_callback('{
-			<
-			(?:mailto:)?
-			(
-				(?:
-					[-!#$%&\'*+/=?^_`.{|}~\w\x80-\xFF]+
-				|
-					".*?"
-				)
-				\@
-				(?:
-					[-a-z0-9\x80-\xFF]+(\.[-a-z0-9\x80-\xFF]+)*\.[a-z]+
-				|
-					\[[\d.a-fA-F:]+\]	# IPv4 & IPv6
-				)
-			)
-			>
-			}xi',
-			array($this, '_doAutoLinks_email_callback'), $text);
-
-		return $text;
-	}
-
-	/**
-	 * Parse URL callback
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doAutoLinks_url_callback($matches) {
-		$url = $this->encodeURLAttribute($matches[1], $text);
-		$link = "<a href=\"$url\">$text</a>";
-		return $this->hashPart($link);
-	}
-
-	/**
-	 * Parse email address callback
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doAutoLinks_email_callback($matches) {
-		$addr = $matches[1];
-		$url = $this->encodeURLAttribute("mailto:$addr", $text);
-		$link = "<a href=\"$url\">$text</a>";
-		return $this->hashPart($link);
-	}
-
-	/**
-	 * Input: some text to obfuscate, e.g. "mailto:foo@example.com"
-	 *
-	 * Output: the same text but with most characters encoded as either a
-	 *         decimal or hex entity, in the hopes of foiling most address
-	 *         harvesting spam bots. E.g.:
-	 *
-	 *        &#109;&#x61;&#105;&#x6c;&#116;&#x6f;&#58;&#x66;o&#111;
-	 *        &#x40;&#101;&#x78;&#97;&#x6d;&#112;&#x6c;&#101;&#46;&#x63;&#111;
-	 *        &#x6d;
-	 *
-	 * Note: the additional output $tail is assigned the same value as the
-	 * ouput, minus the number of characters specified by $head_length.
-	 *
-	 * Based by a filter by Matthew Wickline, posted to BBEdit-Talk.
-	 * With some optimizations by Milian Wolff. Forced encoding of HTML
-	 * attribute special characters by Allan Odgaard.
-	 *
-	 * @param  string  $text
-	 * @param  string  &$tail
-	 * @param  integer $head_length
-	 * @return string
-	 */
-	protected function encodeEntityObfuscatedAttribute($text, &$tail = null, $head_length = 0) {
-		if ($text == "") {
-			return $tail = "";
-		}
-
-		$chars = preg_split('/(?<!^)(?!$)/', $text);
-		$seed = (int)abs(crc32($text) / strlen($text)); // Deterministic seed.
-
-		foreach ($chars as $key => $char) {
-			$ord = ord($char);
-			// Ignore non-ascii chars.
-			if ($ord < 128) {
-				$r = ($seed * (1 + $key)) % 100; // Pseudo-random function.
-				// roughly 10% raw, 45% hex, 45% dec
-				// '@' *must* be encoded. I insist.
-				// '"' and '>' have to be encoded inside the attribute
-				if ($r > 90 && strpos('@"&>', $char) === false) {
-					/* do nothing */
-				} else if ($r < 45) {
-					$chars[$key] = '&#x'.dechex($ord).';';
-				} else {
-					$chars[$key] = '&#'.$ord.';';
-				}
-			}
-		}
-
-		$text = implode('', $chars);
-		$tail = $head_length ? implode('', array_slice($chars, $head_length)) : $text;
-
-		return $text;
-	}
-
-	/**
-	 * Take the string $str and parse it into tokens, hashing embeded HTML,
-	 * escaped characters and handling code spans.
-	 * @param  string $str
-	 * @return string
-	 */
-	protected function parseSpan($str) {
-		$output = '';
-
-		$span_re = '{
-				(
-					\\\\'.$this->escape_chars_re.'
-				|
-					(?<![`\\\\])
-					`+						# code span marker
-			'.( $this->no_markup ? '' : '
-				|
-					<!--    .*?     -->		# comment
-				|
-					<\?.*?\?> | <%.*?%>		# processing instruction
-				|
-					<[!$]?[-a-zA-Z0-9:_]+	# regular tags
-					(?>
-						\s
-						(?>[^"\'>]+|"[^"]*"|\'[^\']*\')*
-					)?
-					>
-				|
-					<[-a-zA-Z0-9:_]+\s*/> # xml-style empty tag
-				|
-					</[-a-zA-Z0-9:_]+\s*> # closing tag
-			').'
-				)
-				}xs';
-
-		while (1) {
-			// Each loop iteration seach for either the next tag, the next
-			// openning code span marker, or the next escaped character.
-			// Each token is then passed to handleSpanToken.
-			$parts = preg_split($span_re, $str, 2, PREG_SPLIT_DELIM_CAPTURE);
-
-			// Create token from text preceding tag.
-			if ($parts[0] != "") {
-				$output .= $parts[0];
-			}
-
-			// Check if we reach the end.
-			if (isset($parts[1])) {
-				$output .= $this->handleSpanToken($parts[1], $parts[2]);
-				$str = $parts[2];
-			} else {
-				break;
-			}
-		}
-
-		return $output;
-	}
-
-	/**
-	 * Handle $token provided by parseSpan by determining its nature and
-	 * returning the corresponding value that should replace it.
-	 * @param  string $token
-	 * @param  string &$str
-	 * @return string
-	 */
-	protected function handleSpanToken($token, &$str) {
-		switch ($token{0}) {
-			case "\\":
-				return $this->hashPart("&#". ord($token{1}). ";");
-			case "`":
-				// Search for end marker in remaining text.
-				if (preg_match('/^(.*?[^`])'.preg_quote($token).'(?!`)(.*)$/sm',
-					$str, $matches))
-				{
-					$str = $matches[2];
-					$codespan = $this->makeCodeSpan($matches[1]);
-					return $this->hashPart($codespan);
-				}
-				return $token; // Return as text since no ending marker found.
-			default:
-				return $this->hashPart($token);
-		}
-	}
-
-	/**
-	 * Remove one level of line-leading tabs or spaces
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function outdent($text) {
-		return preg_replace('/^(\t|[ ]{1,' . $this->tab_width . '})/m', '', $text);
-	}
-
-
-	/**
-	 * String length function for detab. `_initDetab` will create a function to
-	 * handle UTF-8 if the default function does not exist.
-	 * @var string
-	 */
-	protected $utf8_strlen = 'mb_strlen';
-
-	/**
-	 * Replace tabs with the appropriate amount of spaces.
-	 *
-	 * For each line we separate the line in blocks delemited by tab characters.
-	 * Then we reconstruct every line by adding the  appropriate number of space
-	 * between each blocks.
-	 *
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function detab($text) {
-		$text = preg_replace_callback('/^.*\t.*$/m',
-			array($this, '_detab_callback'), $text);
-
-		return $text;
-	}
-
-	/**
-	 * Replace tabs callback
-	 * @param  string $matches
-	 * @return string
-	 */
-	protected function _detab_callback($matches) {
-		$line = $matches[0];
-		$strlen = $this->utf8_strlen; // strlen function for UTF-8.
-
-		// Split in blocks.
-		$blocks = explode("\t", $line);
-		// Add each blocks to the line.
-		$line = $blocks[0];
-		unset($blocks[0]); // Do not add first block twice.
-		foreach ($blocks as $block) {
-			// Calculate amount of space, insert spaces, insert block.
-			$amount = $this->tab_width -
-				$strlen($line, 'UTF-8') % $this->tab_width;
-			$line .= str_repeat(" ", $amount) . $block;
-		}
-		return $line;
-	}
-
-	/**
-	 * Check for the availability of the function in the `utf8_strlen` property
-	 * (initially `mb_strlen`). If the function is not available, create a
-	 * function that will loosely count the number of UTF-8 characters with a
-	 * regular expression.
-	 * @return void
-	 */
-	protected function _initDetab() {
-
-		if (function_exists($this->utf8_strlen)) {
-			return;
-		}
-
-		$this->utf8_strlen = create_function('$text', 'return preg_match_all(
-			"/[\\\\x00-\\\\xBF]|[\\\\xC0-\\\\xFF][\\\\x80-\\\\xBF]*/",
-			$text, $m);');
-	}
-
-	/**
-	 * Swap back in all the tags hashed by _HashHTMLBlocks.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function unhash($text) {
-		return preg_replace_callback('/(.)\x1A[0-9]+\1/',
-			array($this, '_unhash_callback'), $text);
-	}
-
-	/**
-	 * Unhashing callback
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _unhash_callback($matches) {
-		return $this->html_hashes[$matches[0]];
-	}
-}
diff --git a/library/php-markdown/Michelf/MarkdownExtra.inc.php b/library/php-markdown/Michelf/MarkdownExtra.inc.php
deleted file mode 100644
index d09bd7a48..000000000
--- a/library/php-markdown/Michelf/MarkdownExtra.inc.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-// Use this file if you cannot use class autoloading. It will include all the
-// files needed for the MarkdownExtra parser.
-//
-// Take a look at the PSR-0-compatible class autoloading implementation
-// in the Readme.php file if you want a simple autoloader setup.
-
-require_once dirname(__FILE__) . '/MarkdownInterface.php';
-require_once dirname(__FILE__) . '/Markdown.php';
-require_once dirname(__FILE__) . '/MarkdownExtra.php';
diff --git a/library/php-markdown/Michelf/MarkdownExtra.php b/library/php-markdown/Michelf/MarkdownExtra.php
deleted file mode 100644
index c406e8e43..000000000
--- a/library/php-markdown/Michelf/MarkdownExtra.php
+++ /dev/null
@@ -1,1785 +0,0 @@
-<?php
-/**
- * Markdown Extra - A text-to-HTML conversion tool for web writers
- *
- * @package   php-markdown
- * @author    Michel Fortin <michel.fortin@michelf.com>
- * @copyright 2004-2016 Michel Fortin <https://michelf.com/projects/php-markdown/>
- * @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
- */
-
-namespace Michelf;
-
-/**
- * Markdown Extra Parser Class
- */
-class MarkdownExtra extends \Michelf\Markdown {
-	/**
-	 * Configuration variables
-	 */
-
-	/**
-	 * Prefix for footnote ids.
-	 * @var string
-	 */
-	public $fn_id_prefix = "";
-	
-	/**
-	 * Optional title attribute for footnote links and backlinks.
-	 * @var string
-	 */
-	public $fn_link_title     = "";
-	public $fn_backlink_title = "";
-	
-	/**
-	 * Optional class attribute for footnote links and backlinks.
-	 * @var string
-	 */
-	public $fn_link_class     = "footnote-ref";
-	public $fn_backlink_class = "footnote-backref";
-
-	/**
-	 * Content to be displayed within footnote backlinks. The default is '↩';
-	 * the U+FE0E on the end is a Unicode variant selector used to prevent iOS
-	 * from displaying the arrow character as an emoji.
-	 * @var string
-	 */
-	public $fn_backlink_html = '&#8617;&#xFE0E;';
-
-	/**
-	 * Class name for table cell alignment (%% replaced left/center/right)
-	 * For instance: 'go-%%' becomes 'go-left' or 'go-right' or 'go-center'
-	 * If empty, the align attribute is used instead of a class name.
-	 * @var string
-	 */
-	public $table_align_class_tmpl = '';
-
-	/**
-	 * Optional class prefix for fenced code block.
-	 * @var string
-	 */
-	public $code_class_prefix = "";
-
-	/**
-	 * Class attribute for code blocks goes on the `code` tag;
-	 * setting this to true will put attributes on the `pre` tag instead.
-	 * @var boolean
-	 */
-	public $code_attr_on_pre = false;
-
-	/**
-	 * Predefined abbreviations.
-	 * @var array
-	 */
-	public $predef_abbr = array();
-
-	/**
-	 * Parser implementation
-	 */
-	
-	/**
-	 * Constructor function. Initialize the parser object.
-	 * @return void
-	 */
-	public function __construct() {
-		// Add extra escapable characters before parent constructor 
-		// initialize the table.
-		$this->escape_chars .= ':|';
-		
-		// Insert extra document, block, and span transformations. 
-		// Parent constructor will do the sorting.
-		$this->document_gamut += array(
-			"doFencedCodeBlocks" => 5,
-			"stripFootnotes"     => 15,
-			"stripAbbreviations" => 25,
-			"appendFootnotes"    => 50,
-		);
-		$this->block_gamut += array(
-			"doFencedCodeBlocks" => 5,
-			"doTables"           => 15,
-			"doDefLists"         => 45,
-		);
-		$this->span_gamut += array(
-			"doFootnotes"        => 5,
-			"doAbbreviations"    => 70,
-		);
-		
-		$this->enhanced_ordered_list = true;
-		parent::__construct();
-	}
-	
-	
-	/**
-	 * Extra variables used during extra transformations.
-	 * @var array
-	 */
-	protected $footnotes = array();
-	protected $footnotes_ordered = array();
-	protected $footnotes_ref_count = array();
-	protected $footnotes_numbers = array();
-	protected $abbr_desciptions = array();
-	/** @var string */
-	protected $abbr_word_re = '';
-	
-	/**
-	 * Give the current footnote number.
-	 * @var integer
-	 */
-	protected $footnote_counter = 1;
-	
-	/**
-	 * Setting up Extra-specific variables.
-	 */
-	protected function setup() {
-		parent::setup();
-		
-		$this->footnotes = array();
-		$this->footnotes_ordered = array();
-		$this->footnotes_ref_count = array();
-		$this->footnotes_numbers = array();
-		$this->abbr_desciptions = array();
-		$this->abbr_word_re = '';
-		$this->footnote_counter = 1;
-		
-		foreach ($this->predef_abbr as $abbr_word => $abbr_desc) {
-			if ($this->abbr_word_re)
-				$this->abbr_word_re .= '|';
-			$this->abbr_word_re .= preg_quote($abbr_word);
-			$this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
-		}
-	}
-
-	/**
-	 * Clearing Extra-specific variables.
-	 */
-	protected function teardown() {
-		$this->footnotes = array();
-		$this->footnotes_ordered = array();
-		$this->footnotes_ref_count = array();
-		$this->footnotes_numbers = array();
-		$this->abbr_desciptions = array();
-		$this->abbr_word_re = '';
-		
-		parent::teardown();
-	}
-	
-	
-	/**
-	 * Extra attribute parser
-	 */
-
-	/**
-	 * Expression to use to catch attributes (includes the braces)
-	 * @var string
-	 */
-	protected $id_class_attr_catch_re = '\{((?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,})[ ]*\}';
-
-	/**
-	 * Expression to use when parsing in a context when no capture is desired
-	 * @var string
-	 */
-	protected $id_class_attr_nocatch_re = '\{(?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,}[ ]*\}';
-
-	/**
-	 * Parse attributes caught by the $this->id_class_attr_catch_re expression
-	 * and return the HTML-formatted list of attributes.
-	 *
-	 * Currently supported attributes are .class and #id.
-	 *
-	 * In addition, this method also supports supplying a default Id value,
-	 * which will be used to populate the id attribute in case it was not
-	 * overridden.
-	 * @param  string $tag_name
-	 * @param  string $attr
-	 * @param  mixed  $defaultIdValue
-	 * @param  array  $classes
-	 * @return string
-	 */
-	protected function doExtraAttributes($tag_name, $attr, $defaultIdValue = null, $classes = array()) {
-		if (empty($attr) && !$defaultIdValue && empty($classes)) return "";
-		
-		// Split on components
-		preg_match_all('/[#.a-z][-_:a-zA-Z0-9=]+/', $attr, $matches);
-		$elements = $matches[0];
-
-		// Handle classes and IDs (only first ID taken into account)
-		$attributes = array();
-		$id = false;
-		foreach ($elements as $element) {
-			if ($element{0} == '.') {
-				$classes[] = substr($element, 1);
-			} else if ($element{0} == '#') {
-				if ($id === false) $id = substr($element, 1);
-			} else if (strpos($element, '=') > 0) {
-				$parts = explode('=', $element, 2);
-				$attributes[] = $parts[0] . '="' . $parts[1] . '"';
-			}
-		}
-
-		if (!$id) $id = $defaultIdValue;
-
-		// Compose attributes as string
-		$attr_str = "";
-		if (!empty($id)) {
-			$attr_str .= ' id="'.$this->encodeAttribute($id) .'"';
-		}
-		if (!empty($classes)) {
-			$attr_str .= ' class="'. implode(" ", $classes) . '"';
-		}
-		if (!$this->no_markup && !empty($attributes)) {
-			$attr_str .= ' '.implode(" ", $attributes);
-		}
-		return $attr_str;
-	}
-
-	/**
-	 * Strips link definitions from text, stores the URLs and titles in
-	 * hash references.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function stripLinkDefinitions($text) {
-		$less_than_tab = $this->tab_width - 1;
-
-		// Link defs are in the form: ^[id]: url "optional title"
-		$text = preg_replace_callback('{
-							^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?:	# id = $1
-							  [ ]*
-							  \n?				# maybe *one* newline
-							  [ ]*
-							(?:
-							  <(.+?)>			# url = $2
-							|
-							  (\S+?)			# url = $3
-							)
-							  [ ]*
-							  \n?				# maybe one newline
-							  [ ]*
-							(?:
-								(?<=\s)			# lookbehind for whitespace
-								["(]
-								(.*?)			# title = $4
-								[")]
-								[ ]*
-							)?	# title is optional
-					(?:[ ]* '.$this->id_class_attr_catch_re.' )?  # $5 = extra id & class attr
-							(?:\n+|\Z)
-			}xm',
-			array($this, '_stripLinkDefinitions_callback'),
-			$text);
-		return $text;
-	}
-
-	/**
-	 * Strip link definition callback
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _stripLinkDefinitions_callback($matches) {
-		$link_id = strtolower($matches[1]);
-		$url = $matches[2] == '' ? $matches[3] : $matches[2];
-		$this->urls[$link_id] = $url;
-		$this->titles[$link_id] =& $matches[4];
-		$this->ref_attr[$link_id] = $this->doExtraAttributes("", $dummy =& $matches[5]);
-		return ''; // String that will replace the block
-	}
-
-
-	/**
-	 * HTML block parser
-	 */
-	
-	/**
-	 * Tags that are always treated as block tags
-	 * @var string
-	 */
-	protected $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|figure';
-						   
-	/**
-	 * Tags treated as block tags only if the opening tag is alone on its line
-	 * @var string
-	 */
-	protected $context_block_tags_re = 'script|noscript|style|ins|del|iframe|object|source|track|param|math|svg|canvas|audio|video';
-	
-	/**
-	 * Tags where markdown="1" default to span mode:
-	 * @var string
-	 */
-	protected $contain_span_tags_re = 'p|h[1-6]|li|dd|dt|td|th|legend|address';
-	
-	/**
-	 * Tags which must not have their contents modified, no matter where
-	 * they appear
-	 * @var string
-	 */
-	protected $clean_tags_re = 'script|style|math|svg';
-	
-	/**
-	 * Tags that do not need to be closed.
-	 * @var string
-	 */
-	protected $auto_close_tags_re = 'hr|img|param|source|track';
-	
-	/**
-	 * Hashify HTML Blocks and "clean tags".
-	 *
-	 * We only want to do this for block-level HTML tags, such as headers,
-	 * lists, and tables. That's because we still want to wrap <p>s around
-	 * "paragraphs" that are wrapped in non-block-level tags, such as anchors,
-	 * phrase emphasis, and spans. The list of tags we're looking for is
-	 * hard-coded.
-	 *
-	 * This works by calling _HashHTMLBlocks_InMarkdown, which then calls
-	 * _HashHTMLBlocks_InHTML when it encounter block tags. When the markdown="1" 
-	 * attribute is found within a tag, _HashHTMLBlocks_InHTML calls back
-	 *  _HashHTMLBlocks_InMarkdown to handle the Markdown syntax within the tag.
-	 * These two functions are calling each other. It's recursive!
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function hashHTMLBlocks($text) {
-		if ($this->no_markup) {
-			return $text;
-		}
-
-		// Call the HTML-in-Markdown hasher.
-		list($text, ) = $this->_hashHTMLBlocks_inMarkdown($text);
-		
-		return $text;
-	}
-
-	/**
-	 * Parse markdown text, calling _HashHTMLBlocks_InHTML for block tags.
-	 *
-	 * *   $indent is the number of space to be ignored when checking for code 
-	 *     blocks. This is important because if we don't take the indent into 
-	 *     account, something like this (which looks right) won't work as expected:
-	 *
-	 *     <div>
-	 *         <div markdown="1">
-	 *         Hello World.  <-- Is this a Markdown code block or text?
-	 *         </div>  <-- Is this a Markdown code block or a real tag?
-	 *     <div>
-	 *
-	 *     If you don't like this, just don't indent the tag on which
-	 *     you apply the markdown="1" attribute.
-	 *
-	 * *   If $enclosing_tag_re is not empty, stops at the first unmatched closing 
-	 *     tag with that name. Nested tags supported.
-	 *
-	 * *   If $span is true, text inside must treated as span. So any double 
-	 *     newline will be replaced by a single newline so that it does not create 
-	 *     paragraphs.
-	 *
-	 * Returns an array of that form: ( processed text , remaining text )
-	 *
-	 * @param  string  $text
-	 * @param  integer $indent
-	 * @param  string  $enclosing_tag_re
-	 * @param  boolean $span
-	 * @return array
-	 */
-	protected function _hashHTMLBlocks_inMarkdown($text, $indent = 0,
-										$enclosing_tag_re = '', $span = false)
-	{
-	
-		if ($text === '') return array('', '');
-
-		// Regex to check for the presense of newlines around a block tag.
-		$newline_before_re = '/(?:^\n?|\n\n)*$/';
-		$newline_after_re = 
-			'{
-				^						# Start of text following the tag.
-				(?>[ ]*<!--.*?-->)?		# Optional comment.
-				[ ]*\n					# Must be followed by newline.
-			}xs';
-		
-		// Regex to match any tag.
-		$block_tag_re =
-			'{
-				(					# $2: Capture whole tag.
-					</?					# Any opening or closing tag.
-						(?>				# Tag name.
-							' . $this->block_tags_re . '			|
-							' . $this->context_block_tags_re . '	|
-							' . $this->clean_tags_re . '        	|
-							(?!\s)'.$enclosing_tag_re . '
-						)
-						(?:
-							(?=[\s"\'/a-zA-Z0-9])	# Allowed characters after tag name.
-							(?>
-								".*?"		|	# Double quotes (can contain `>`)
-								\'.*?\'   	|	# Single quotes (can contain `>`)
-								.+?				# Anything but quotes and `>`.
-							)*?
-						)?
-					>					# End of tag.
-				|
-					<!--    .*?     -->	# HTML Comment
-				|
-					<\?.*?\?> | <%.*?%>	# Processing instruction
-				|
-					<!\[CDATA\[.*?\]\]>	# CData Block
-				' . ( !$span ? ' # If not in span.
-				|
-					# Indented code block
-					(?: ^[ ]*\n | ^ | \n[ ]*\n )
-					[ ]{' . ($indent + 4) . '}[^\n]* \n
-					(?>
-						(?: [ ]{' . ($indent + 4) . '}[^\n]* | [ ]* ) \n
-					)*
-				|
-					# Fenced code block marker
-					(?<= ^ | \n )
-					[ ]{0,' . ($indent + 3) . '}(?:~{3,}|`{3,})
-					[ ]*
-					(?: \.?[-_:a-zA-Z0-9]+ )? # standalone class name
-					[ ]*
-					(?: ' . $this->id_class_attr_nocatch_re . ' )? # extra attributes
-					[ ]*
-					(?= \n )
-				' : '' ) . ' # End (if not is span).
-				|
-					# Code span marker
-					# Note, this regex needs to go after backtick fenced
-					# code blocks but it should also be kept outside of the
-					# "if not in span" condition adding backticks to the parser
-					`+
-				)
-			}xs';
-
-		
-		$depth = 0;		// Current depth inside the tag tree.
-		$parsed = "";	// Parsed text that will be returned.
-
-		// Loop through every tag until we find the closing tag of the parent
-		// or loop until reaching the end of text if no parent tag specified.
-		do {
-			// Split the text using the first $tag_match pattern found.
-			// Text before  pattern will be first in the array, text after
-			// pattern will be at the end, and between will be any catches made 
-			// by the pattern.
-			$parts = preg_split($block_tag_re, $text, 2, 
-								PREG_SPLIT_DELIM_CAPTURE);
-			
-			// If in Markdown span mode, add a empty-string span-level hash 
-			// after each newline to prevent triggering any block element.
-			if ($span) {
-				$void = $this->hashPart("", ':');
-				$newline = "\n$void";
-				$parts[0] = $void . str_replace("\n", $newline, $parts[0]) . $void;
-			}
-			
-			$parsed .= $parts[0]; // Text before current tag.
-			
-			// If end of $text has been reached. Stop loop.
-			if (count($parts) < 3) {
-				$text = "";
-				break;
-			}
-			
-			$tag  = $parts[1]; // Tag to handle.
-			$text = $parts[2]; // Remaining text after current tag.
-			$tag_re = preg_quote($tag); // For use in a regular expression.
-			
-			// Check for: Fenced code block marker.
-			// Note: need to recheck the whole tag to disambiguate backtick
-			// fences from code spans
-			if (preg_match('{^\n?([ ]{0,' . ($indent + 3) . '})(~{3,}|`{3,})[ ]*(?:\.?[-_:a-zA-Z0-9]+)?[ ]*(?:' . $this->id_class_attr_nocatch_re . ')?[ ]*\n?$}', $tag, $capture)) {
-				// Fenced code block marker: find matching end marker.
-				$fence_indent = strlen($capture[1]); // use captured indent in re
-				$fence_re = $capture[2]; // use captured fence in re
-				if (preg_match('{^(?>.*\n)*?[ ]{' . ($fence_indent) . '}' . $fence_re . '[ ]*(?:\n|$)}', $text,
-					$matches)) 
-				{
-					// End marker found: pass text unchanged until marker.
-					$parsed .= $tag . $matches[0];
-					$text = substr($text, strlen($matches[0]));
-				}
-				else {
-					// No end marker: just skip it.
-					$parsed .= $tag;
-				}
-			}
-			// Check for: Indented code block.
-			else if ($tag{0} == "\n" || $tag{0} == " ") {
-				// Indented code block: pass it unchanged, will be handled 
-				// later.
-				$parsed .= $tag;
-			}
-			// Check for: Code span marker
-			// Note: need to check this after backtick fenced code blocks
-			else if ($tag{0} == "`") {
-				// Find corresponding end marker.
-				$tag_re = preg_quote($tag);
-				if (preg_match('{^(?>.+?|\n(?!\n))*?(?<!`)' . $tag_re . '(?!`)}',
-					$text, $matches))
-				{
-					// End marker found: pass text unchanged until marker.
-					$parsed .= $tag . $matches[0];
-					$text = substr($text, strlen($matches[0]));
-				}
-				else {
-					// Unmatched marker: just skip it.
-					$parsed .= $tag;
-				}
-			}
-			// Check for: Opening Block level tag or
-			//            Opening Context Block tag (like ins and del) 
-			//               used as a block tag (tag is alone on it's line).
-			else if (preg_match('{^<(?:' . $this->block_tags_re . ')\b}', $tag) ||
-				(	preg_match('{^<(?:' . $this->context_block_tags_re . ')\b}', $tag) &&
-					preg_match($newline_before_re, $parsed) &&
-					preg_match($newline_after_re, $text)	)
-				)
-			{
-				// Need to parse tag and following text using the HTML parser.
-				list($block_text, $text) = 
-					$this->_hashHTMLBlocks_inHTML($tag . $text, "hashBlock", true);
-				
-				// Make sure it stays outside of any paragraph by adding newlines.
-				$parsed .= "\n\n$block_text\n\n";
-			}
-			// Check for: Clean tag (like script, math)
-			//            HTML Comments, processing instructions.
-			else if (preg_match('{^<(?:' . $this->clean_tags_re . ')\b}', $tag) ||
-				$tag{1} == '!' || $tag{1} == '?')
-			{
-				// Need to parse tag and following text using the HTML parser.
-				// (don't check for markdown attribute)
-				list($block_text, $text) = 
-					$this->_hashHTMLBlocks_inHTML($tag . $text, "hashClean", false);
-				
-				$parsed .= $block_text;
-			}
-			// Check for: Tag with same name as enclosing tag.
-			else if ($enclosing_tag_re !== '' &&
-				// Same name as enclosing tag.
-				preg_match('{^</?(?:' . $enclosing_tag_re . ')\b}', $tag))
-			{
-				// Increase/decrease nested tag count.
-				if ($tag{1} == '/')						$depth--;
-				else if ($tag{strlen($tag)-2} != '/')	$depth++;
-
-				if ($depth < 0) {
-					// Going out of parent element. Clean up and break so we
-					// return to the calling function.
-					$text = $tag . $text;
-					break;
-				}
-				
-				$parsed .= $tag;
-			}
-			else {
-				$parsed .= $tag;
-			}
-		} while ($depth >= 0);
-		
-		return array($parsed, $text);
-	}
-
-	/**
-	 * Parse HTML, calling _HashHTMLBlocks_InMarkdown for block tags.
-	 *
-	 * *   Calls $hash_method to convert any blocks.
-	 * *   Stops when the first opening tag closes.
-	 * *   $md_attr indicate if the use of the `markdown="1"` attribute is allowed.
-	 *     (it is not inside clean tags)
-	 *
-	 * Returns an array of that form: ( processed text , remaining text )
-	 * @param  string $text
-	 * @param  string $hash_method
-	 * @param  string $md_attr
-	 * @return array
-	 */
-	protected function _hashHTMLBlocks_inHTML($text, $hash_method, $md_attr) {
-		if ($text === '') return array('', '');
-		
-		// Regex to match `markdown` attribute inside of a tag.
-		$markdown_attr_re = '
-			{
-				\s*			# Eat whitespace before the `markdown` attribute
-				markdown
-				\s*=\s*
-				(?>
-					(["\'])		# $1: quote delimiter		
-					(.*?)		# $2: attribute value
-					\1			# matching delimiter	
-				|
-					([^\s>]*)	# $3: unquoted attribute value
-				)
-				()				# $4: make $3 always defined (avoid warnings)
-			}xs';
-		
-		// Regex to match any tag.
-		$tag_re = '{
-				(					# $2: Capture whole tag.
-					</?					# Any opening or closing tag.
-						[\w:$]+			# Tag name.
-						(?:
-							(?=[\s"\'/a-zA-Z0-9])	# Allowed characters after tag name.
-							(?>
-								".*?"		|	# Double quotes (can contain `>`)
-								\'.*?\'   	|	# Single quotes (can contain `>`)
-								.+?				# Anything but quotes and `>`.
-							)*?
-						)?
-					>					# End of tag.
-				|
-					<!--    .*?     -->	# HTML Comment
-				|
-					<\?.*?\?> | <%.*?%>	# Processing instruction
-				|
-					<!\[CDATA\[.*?\]\]>	# CData Block
-				)
-			}xs';
-		
-		$original_text = $text;		// Save original text in case of faliure.
-		
-		$depth		= 0;	// Current depth inside the tag tree.
-		$block_text	= "";	// Temporary text holder for current text.
-		$parsed		= "";	// Parsed text that will be returned.
-
-		// Get the name of the starting tag.
-		// (This pattern makes $base_tag_name_re safe without quoting.)
-		if (preg_match('/^<([\w:$]*)\b/', $text, $matches))
-			$base_tag_name_re = $matches[1];
-
-		// Loop through every tag until we find the corresponding closing tag.
-		do {
-			// Split the text using the first $tag_match pattern found.
-			// Text before  pattern will be first in the array, text after
-			// pattern will be at the end, and between will be any catches made 
-			// by the pattern.
-			$parts = preg_split($tag_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE);
-			
-			if (count($parts) < 3) {
-				// End of $text reached with unbalenced tag(s).
-				// In that case, we return original text unchanged and pass the
-				// first character as filtered to prevent an infinite loop in the 
-				// parent function.
-				return array($original_text{0}, substr($original_text, 1));
-			}
-			
-			$block_text .= $parts[0]; // Text before current tag.
-			$tag         = $parts[1]; // Tag to handle.
-			$text        = $parts[2]; // Remaining text after current tag.
-			
-			// Check for: Auto-close tag (like <hr/>)
-			//			 Comments and Processing Instructions.
-			if (preg_match('{^</?(?:' . $this->auto_close_tags_re . ')\b}', $tag) ||
-				$tag{1} == '!' || $tag{1} == '?')
-			{
-				// Just add the tag to the block as if it was text.
-				$block_text .= $tag;
-			}
-			else {
-				// Increase/decrease nested tag count. Only do so if
-				// the tag's name match base tag's.
-				if (preg_match('{^</?' . $base_tag_name_re . '\b}', $tag)) {
-					if ($tag{1} == '/')						$depth--;
-					else if ($tag{strlen($tag)-2} != '/')	$depth++;
-				}
-				
-				// Check for `markdown="1"` attribute and handle it.
-				if ($md_attr && 
-					preg_match($markdown_attr_re, $tag, $attr_m) &&
-					preg_match('/^1|block|span$/', $attr_m[2] . $attr_m[3]))
-				{
-					// Remove `markdown` attribute from opening tag.
-					$tag = preg_replace($markdown_attr_re, '', $tag);
-					
-					// Check if text inside this tag must be parsed in span mode.
-					$this->mode = $attr_m[2] . $attr_m[3];
-					$span_mode = $this->mode == 'span' || $this->mode != 'block' &&
-						preg_match('{^<(?:' . $this->contain_span_tags_re . ')\b}', $tag);
-					
-					// Calculate indent before tag.
-					if (preg_match('/(?:^|\n)( *?)(?! ).*?$/', $block_text, $matches)) {
-						$strlen = $this->utf8_strlen;
-						$indent = $strlen($matches[1], 'UTF-8');
-					} else {
-						$indent = 0;
-					}
-					
-					// End preceding block with this tag.
-					$block_text .= $tag;
-					$parsed .= $this->$hash_method($block_text);
-					
-					// Get enclosing tag name for the ParseMarkdown function.
-					// (This pattern makes $tag_name_re safe without quoting.)
-					preg_match('/^<([\w:$]*)\b/', $tag, $matches);
-					$tag_name_re = $matches[1];
-					
-					// Parse the content using the HTML-in-Markdown parser.
-					list ($block_text, $text)
-						= $this->_hashHTMLBlocks_inMarkdown($text, $indent, 
-							$tag_name_re, $span_mode);
-					
-					// Outdent markdown text.
-					if ($indent > 0) {
-						$block_text = preg_replace("/^[ ]{1,$indent}/m", "", 
-													$block_text);
-					}
-					
-					// Append tag content to parsed text.
-					if (!$span_mode)	$parsed .= "\n\n$block_text\n\n";
-					else				$parsed .= "$block_text";
-					
-					// Start over with a new block.
-					$block_text = "";
-				}
-				else $block_text .= $tag;
-			}
-			
-		} while ($depth > 0);
-		
-		// Hash last block text that wasn't processed inside the loop.
-		$parsed .= $this->$hash_method($block_text);
-		
-		return array($parsed, $text);
-	}
-
-	/**
-	 * Called whenever a tag must be hashed when a function inserts a "clean" tag
-	 * in $text, it passes through this function and is automaticaly escaped, 
-	 * blocking invalid nested overlap.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function hashClean($text) {
-		return $this->hashPart($text, 'C');
-	}
-
-	/**
-	 * Turn Markdown link shortcuts into XHTML <a> tags.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doAnchors($text) {
-		if ($this->in_anchor) {
-			return $text;
-		}
-		$this->in_anchor = true;
-
-		// First, handle reference-style links: [link text] [id]
-		$text = preg_replace_callback('{
-			(					# wrap whole match in $1
-			  \[
-				(' . $this->nested_brackets_re . ')	# link text = $2
-			  \]
-
-			  [ ]?				# one optional space
-			  (?:\n[ ]*)?		# one optional newline followed by spaces
-
-			  \[
-				(.*?)		# id = $3
-			  \]
-			)
-			}xs',
-			array($this, '_doAnchors_reference_callback'), $text);
-
-		// Next, inline-style links: [link text](url "optional title")
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  \[
-				(' . $this->nested_brackets_re . ')	# link text = $2
-			  \]
-			  \(			# literal paren
-				[ \n]*
-				(?:
-					<(.+?)>	# href = $3
-				|
-					(' . $this->nested_url_parenthesis_re . ')	# href = $4
-				)
-				[ \n]*
-				(			# $5
-				  ([\'"])	# quote char = $6
-				  (.*?)		# Title = $7
-				  \6		# matching quote
-				  [ \n]*	# ignore any spaces/tabs between closing quote and )
-				)?			# title is optional
-			  \)
-			  (?:[ ]? ' . $this->id_class_attr_catch_re . ' )?	 # $8 = id/class attributes
-			)
-			}xs',
-			array($this, '_doAnchors_inline_callback'), $text);
-
-		// Last, handle reference-style shortcuts: [link text]
-		// These must come last in case you've also got [link text][1]
-		// or [link text](/foo)
-		$text = preg_replace_callback('{
-			(					# wrap whole match in $1
-			  \[
-				([^\[\]]+)		# link text = $2; can\'t contain [ or ]
-			  \]
-			)
-			}xs',
-			array($this, '_doAnchors_reference_callback'), $text);
-
-		$this->in_anchor = false;
-		return $text;
-	}
-
-	/**
-	 * Callback for reference anchors
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doAnchors_reference_callback($matches) {
-		$whole_match =  $matches[1];
-		$link_text   =  $matches[2];
-		$link_id     =& $matches[3];
-
-		if ($link_id == "") {
-			// for shortcut links like [this][] or [this].
-			$link_id = $link_text;
-		}
-		
-		// lower-case and turn embedded newlines into spaces
-		$link_id = strtolower($link_id);
-		$link_id = preg_replace('{[ ]?\n}', ' ', $link_id);
-
-		if (isset($this->urls[$link_id])) {
-			$url = $this->urls[$link_id];
-			$url = $this->encodeURLAttribute($url);
-			
-			$result = "<a href=\"$url\"";
-			if ( isset( $this->titles[$link_id] ) ) {
-				$title = $this->titles[$link_id];
-				$title = $this->encodeAttribute($title);
-				$result .=  " title=\"$title\"";
-			}
-			if (isset($this->ref_attr[$link_id]))
-				$result .= $this->ref_attr[$link_id];
-		
-			$link_text = $this->runSpanGamut($link_text);
-			$result .= ">$link_text</a>";
-			$result = $this->hashPart($result);
-		}
-		else {
-			$result = $whole_match;
-		}
-		return $result;
-	}
-
-	/**
-	 * Callback for inline anchors
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doAnchors_inline_callback($matches) {
-		$whole_match	=  $matches[1];
-		$link_text		=  $this->runSpanGamut($matches[2]);
-		$url			=  $matches[3] == '' ? $matches[4] : $matches[3];
-		$title			=& $matches[7];
-		$attr  = $this->doExtraAttributes("a", $dummy =& $matches[8]);
-
-		// if the URL was of the form <s p a c e s> it got caught by the HTML
-		// tag parser and hashed. Need to reverse the process before using the URL.
-		$unhashed = $this->unhash($url);
-		if ($unhashed != $url)
-			$url = preg_replace('/^<(.*)>$/', '\1', $unhashed);
-
-		$url = $this->encodeURLAttribute($url);
-
-		$result = "<a href=\"$url\"";
-		if (isset($title)) {
-			$title = $this->encodeAttribute($title);
-			$result .=  " title=\"$title\"";
-		}
-		$result .= $attr;
-		
-		$link_text = $this->runSpanGamut($link_text);
-		$result .= ">$link_text</a>";
-
-		return $this->hashPart($result);
-	}
-
-	/**
-	 * Turn Markdown image shortcuts into <img> tags.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doImages($text) {
-		// First, handle reference-style labeled images: ![alt text][id]
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  !\[
-				(' . $this->nested_brackets_re . ')		# alt text = $2
-			  \]
-
-			  [ ]?				# one optional space
-			  (?:\n[ ]*)?		# one optional newline followed by spaces
-
-			  \[
-				(.*?)		# id = $3
-			  \]
-
-			)
-			}xs', 
-			array($this, '_doImages_reference_callback'), $text);
-
-		// Next, handle inline images:  ![alt text](url "optional title")
-		// Don't forget: encode * and _
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  !\[
-				(' . $this->nested_brackets_re . ')		# alt text = $2
-			  \]
-			  \s?			# One optional whitespace character
-			  \(			# literal paren
-				[ \n]*
-				(?:
-					<(\S*)>	# src url = $3
-				|
-					(' . $this->nested_url_parenthesis_re . ')	# src url = $4
-				)
-				[ \n]*
-				(			# $5
-				  ([\'"])	# quote char = $6
-				  (.*?)		# title = $7
-				  \6		# matching quote
-				  [ \n]*
-				)?			# title is optional
-			  \)
-			  (?:[ ]? ' . $this->id_class_attr_catch_re . ' )?	 # $8 = id/class attributes
-			)
-			}xs',
-			array($this, '_doImages_inline_callback'), $text);
-
-		return $text;
-	}
-
-	/**
-	 * Callback for referenced images
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doImages_reference_callback($matches) {
-		$whole_match = $matches[1];
-		$alt_text    = $matches[2];
-		$link_id     = strtolower($matches[3]);
-
-		if ($link_id == "") {
-			$link_id = strtolower($alt_text); // for shortcut links like ![this][].
-		}
-
-		$alt_text = $this->encodeAttribute($alt_text);
-		if (isset($this->urls[$link_id])) {
-			$url = $this->encodeURLAttribute($this->urls[$link_id]);
-			$result = "<img src=\"$url\" alt=\"$alt_text\"";
-			if (isset($this->titles[$link_id])) {
-				$title = $this->titles[$link_id];
-				$title = $this->encodeAttribute($title);
-				$result .=  " title=\"$title\"";
-			}
-			if (isset($this->ref_attr[$link_id]))
-				$result .= $this->ref_attr[$link_id];
-			$result .= $this->empty_element_suffix;
-			$result = $this->hashPart($result);
-		}
-		else {
-			// If there's no such link ID, leave intact:
-			$result = $whole_match;
-		}
-
-		return $result;
-	}
-
-	/**
-	 * Callback for inline images
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doImages_inline_callback($matches) {
-		$whole_match	= $matches[1];
-		$alt_text		= $matches[2];
-		$url			= $matches[3] == '' ? $matches[4] : $matches[3];
-		$title			=& $matches[7];
-		$attr  = $this->doExtraAttributes("img", $dummy =& $matches[8]);
-
-		$alt_text = $this->encodeAttribute($alt_text);
-		$url = $this->encodeURLAttribute($url);
-		$result = "<img src=\"$url\" alt=\"$alt_text\"";
-		if (isset($title)) {
-			$title = $this->encodeAttribute($title);
-			$result .=  " title=\"$title\""; // $title already quoted
-		}
-		$result .= $attr;
-		$result .= $this->empty_element_suffix;
-
-		return $this->hashPart($result);
-	}
-
-	/**
-	 * Process markdown headers. Redefined to add ID and class attribute support.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doHeaders($text) {
-		// Setext-style headers:
-		//  Header 1  {#header1}
-		//	  ========
-		//  
-		//	  Header 2  {#header2 .class1 .class2}
-		//	  --------
-		//
-		$text = preg_replace_callback(
-			'{
-				(^.+?)								# $1: Header text
-				(?:[ ]+ ' . $this->id_class_attr_catch_re . ' )?	 # $3 = id/class attributes
-				[ ]*\n(=+|-+)[ ]*\n+				# $3: Header footer
-			}mx',
-			array($this, '_doHeaders_callback_setext'), $text);
-
-		// atx-style headers:
-		//	# Header 1        {#header1}
-		//	## Header 2       {#header2}
-		//	## Header 2 with closing hashes ##  {#header3.class1.class2}
-		//	...
-		//	###### Header 6   {.class2}
-		//
-		$text = preg_replace_callback('{
-				^(\#{1,6})	# $1 = string of #\'s
-				[ ]*
-				(.+?)		# $2 = Header text
-				[ ]*
-				\#*			# optional closing #\'s (not counted)
-				(?:[ ]+ ' . $this->id_class_attr_catch_re . ' )?	 # $3 = id/class attributes
-				[ ]*
-				\n+
-			}xm',
-			array($this, '_doHeaders_callback_atx'), $text);
-
-		return $text;
-	}
-
-	/**
-	 * Callback for setext headers
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doHeaders_callback_setext($matches) {
-		if ($matches[3] == '-' && preg_match('{^- }', $matches[1])) {
-			return $matches[0];
-		}
-
-		$level = $matches[3]{0} == '=' ? 1 : 2;
-
-		$defaultId = is_callable($this->header_id_func) ? call_user_func($this->header_id_func, $matches[1]) : null;
-
-		$attr  = $this->doExtraAttributes("h$level", $dummy =& $matches[2], $defaultId);
-		$block = "<h$level$attr>" . $this->runSpanGamut($matches[1]) . "</h$level>";
-		return "\n" . $this->hashBlock($block) . "\n\n";
-	}
-
-	/**
-	 * Callback for atx headers
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doHeaders_callback_atx($matches) {
-		$level = strlen($matches[1]);
-
-		$defaultId = is_callable($this->header_id_func) ? call_user_func($this->header_id_func, $matches[2]) : null;
-		$attr  = $this->doExtraAttributes("h$level", $dummy =& $matches[3], $defaultId);
-		$block = "<h$level$attr>" . $this->runSpanGamut($matches[2]) . "</h$level>";
-		return "\n" . $this->hashBlock($block) . "\n\n";
-	}
-
-	/**
-	 * Form HTML tables.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doTables($text) {
-		$less_than_tab = $this->tab_width - 1;
-		// Find tables with leading pipe.
-		//
-		//	| Header 1 | Header 2
-		//	| -------- | --------
-		//	| Cell 1   | Cell 2
-		//	| Cell 3   | Cell 4
-		$text = preg_replace_callback('
-			{
-				^							# Start of a line
-				[ ]{0,' . $less_than_tab . '}	# Allowed whitespace.
-				[|]							# Optional leading pipe (present)
-				(.+) \n						# $1: Header row (at least one pipe)
-				
-				[ ]{0,' . $less_than_tab . '}	# Allowed whitespace.
-				[|] ([ ]*[-:]+[-| :]*) \n	# $2: Header underline
-				
-				(							# $3: Cells
-					(?>
-						[ ]*				# Allowed whitespace.
-						[|] .* \n			# Row content.
-					)*
-				)
-				(?=\n|\Z)					# Stop at final double newline.
-			}xm',
-			array($this, '_doTable_leadingPipe_callback'), $text);
-
-		// Find tables without leading pipe.
-		//
-		//	Header 1 | Header 2
-		//	-------- | --------
-		//	Cell 1   | Cell 2
-		//	Cell 3   | Cell 4
-		$text = preg_replace_callback('
-			{
-				^							# Start of a line
-				[ ]{0,' . $less_than_tab . '}	# Allowed whitespace.
-				(\S.*[|].*) \n				# $1: Header row (at least one pipe)
-				
-				[ ]{0,' . $less_than_tab . '}	# Allowed whitespace.
-				([-:]+[ ]*[|][-| :]*) \n	# $2: Header underline
-				
-				(							# $3: Cells
-					(?>
-						.* [|] .* \n		# Row content
-					)*
-				)
-				(?=\n|\Z)					# Stop at final double newline.
-			}xm',
-			array($this, '_DoTable_callback'), $text);
-
-		return $text;
-	}
-
-	/**
-	 * Callback for removing the leading pipe for each row
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doTable_leadingPipe_callback($matches) {
-		$head		= $matches[1];
-		$underline	= $matches[2];
-		$content	= $matches[3];
-
-		$content	= preg_replace('/^ *[|]/m', '', $content);
-		
-		return $this->_doTable_callback(array($matches[0], $head, $underline, $content));
-	}
-
-	/**
-	 * Make the align attribute in a table
-	 * @param  string $alignname
-	 * @return string
-	 */
-	protected function _doTable_makeAlignAttr($alignname)
-	{
-		if (empty($this->table_align_class_tmpl)) {
-			return " align=\"$alignname\"";
-		}
-
-		$classname = str_replace('%%', $alignname, $this->table_align_class_tmpl);
-		return " class=\"$classname\"";
-	}
-
-	/**
-	 * Calback for processing tables
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doTable_callback($matches) {
-		$head		= $matches[1];
-		$underline	= $matches[2];
-		$content	= $matches[3];
-
-		// Remove any tailing pipes for each line.
-		$head		= preg_replace('/[|] *$/m', '', $head);
-		$underline	= preg_replace('/[|] *$/m', '', $underline);
-		$content	= preg_replace('/[|] *$/m', '', $content);
-		
-		// Reading alignement from header underline.
-		$separators	= preg_split('/ *[|] */', $underline);
-		foreach ($separators as $n => $s) {
-			if (preg_match('/^ *-+: *$/', $s))
-				$attr[$n] = $this->_doTable_makeAlignAttr('right');
-			else if (preg_match('/^ *:-+: *$/', $s))
-				$attr[$n] = $this->_doTable_makeAlignAttr('center');
-			else if (preg_match('/^ *:-+ *$/', $s))
-				$attr[$n] = $this->_doTable_makeAlignAttr('left');
-			else
-				$attr[$n] = '';
-		}
-		
-		// Parsing span elements, including code spans, character escapes, 
-		// and inline HTML tags, so that pipes inside those gets ignored.
-		$head		= $this->parseSpan($head);
-		$headers	= preg_split('/ *[|] */', $head);
-		$col_count	= count($headers);
-		$attr       = array_pad($attr, $col_count, '');
-		
-		// Write column headers.
-		$text = "<table>\n";
-		$text .= "<thead>\n";
-		$text .= "<tr>\n";
-		foreach ($headers as $n => $header)
-			$text .= "  <th$attr[$n]>" . $this->runSpanGamut(trim($header)) . "</th>\n";
-		$text .= "</tr>\n";
-		$text .= "</thead>\n";
-		
-		// Split content by row.
-		$rows = explode("\n", trim($content, "\n"));
-		
-		$text .= "<tbody>\n";
-		foreach ($rows as $row) {
-			// Parsing span elements, including code spans, character escapes, 
-			// and inline HTML tags, so that pipes inside those gets ignored.
-			$row = $this->parseSpan($row);
-			
-			// Split row by cell.
-			$row_cells = preg_split('/ *[|] */', $row, $col_count);
-			$row_cells = array_pad($row_cells, $col_count, '');
-			
-			$text .= "<tr>\n";
-			foreach ($row_cells as $n => $cell)
-				$text .= "  <td$attr[$n]>" . $this->runSpanGamut(trim($cell)) . "</td>\n";
-			$text .= "</tr>\n";
-		}
-		$text .= "</tbody>\n";
-		$text .= "</table>";
-		
-		return $this->hashBlock($text) . "\n";
-	}
-
-	/**
-	 * Form HTML definition lists.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doDefLists($text) {
-		$less_than_tab = $this->tab_width - 1;
-
-		// Re-usable pattern to match any entire dl list:
-		$whole_list_re = '(?>
-			(								# $1 = whole list
-			  (								# $2
-				[ ]{0,' . $less_than_tab . '}
-				((?>.*\S.*\n)+)				# $3 = defined term
-				\n?
-				[ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition
-			  )
-			  (?s:.+?)
-			  (								# $4
-				  \z
-				|
-				  \n{2,}
-				  (?=\S)
-				  (?!						# Negative lookahead for another term
-					[ ]{0,' . $less_than_tab . '}
-					(?: \S.*\n )+?			# defined term
-					\n?
-					[ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition
-				  )
-				  (?!						# Negative lookahead for another definition
-					[ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition
-				  )
-			  )
-			)
-		)'; // mx
-
-		$text = preg_replace_callback('{
-				(?>\A\n?|(?<=\n\n))
-				' . $whole_list_re . '
-			}mx',
-			array($this, '_doDefLists_callback'), $text);
-
-		return $text;
-	}
-
-	/**
-	 * Callback for processing definition lists
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doDefLists_callback($matches) {
-		// Re-usable patterns to match list item bullets and number markers:
-		$list = $matches[1];
-		
-		// Turn double returns into triple returns, so that we can make a
-		// paragraph for the last item in a list, if necessary:
-		$result = trim($this->processDefListItems($list));
-		$result = "<dl>\n" . $result . "\n</dl>";
-		return $this->hashBlock($result) . "\n\n";
-	}
-
-	/**
-	 * Process the contents of a single definition list, splitting it
-	 * into individual term and definition list items.
-	 * @param  string $list_str
-	 * @return string
-	 */
-	protected function processDefListItems($list_str) {
-	
-		$less_than_tab = $this->tab_width - 1;
-		
-		// Trim trailing blank lines:
-		$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
-
-		// Process definition terms.
-		$list_str = preg_replace_callback('{
-			(?>\A\n?|\n\n+)						# leading line
-			(									# definition terms = $1
-				[ ]{0,' . $less_than_tab . '}	# leading whitespace
-				(?!\:[ ]|[ ])					# negative lookahead for a definition
-												#   mark (colon) or more whitespace.
-				(?> \S.* \n)+?					# actual term (not whitespace).	
-			)			
-			(?=\n?[ ]{0,3}:[ ])					# lookahead for following line feed 
-												#   with a definition mark.
-			}xm',
-			array($this, '_processDefListItems_callback_dt'), $list_str);
-
-		// Process actual definitions.
-		$list_str = preg_replace_callback('{
-			\n(\n+)?							# leading line = $1
-			(									# marker space = $2
-				[ ]{0,' . $less_than_tab . '}	# whitespace before colon
-				\:[ ]+							# definition mark (colon)
-			)
-			((?s:.+?))							# definition text = $3
-			(?= \n+ 							# stop at next definition mark,
-				(?:								# next term or end of text
-					[ ]{0,' . $less_than_tab . '} \:[ ]	|
-					<dt> | \z
-				)						
-			)					
-			}xm',
-			array($this, '_processDefListItems_callback_dd'), $list_str);
-
-		return $list_str;
-	}
-
-	/**
-	 * Callback for <dt> elements in definition lists
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _processDefListItems_callback_dt($matches) {
-		$terms = explode("\n", trim($matches[1]));
-		$text = '';
-		foreach ($terms as $term) {
-			$term = $this->runSpanGamut(trim($term));
-			$text .= "\n<dt>" . $term . "</dt>";
-		}
-		return $text . "\n";
-	}
-
-	/**
-	 * Callback for <dd> elements in definition lists
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _processDefListItems_callback_dd($matches) {
-		$leading_line	= $matches[1];
-		$marker_space	= $matches[2];
-		$def			= $matches[3];
-
-		if ($leading_line || preg_match('/\n{2,}/', $def)) {
-			// Replace marker with the appropriate whitespace indentation
-			$def = str_repeat(' ', strlen($marker_space)) . $def;
-			$def = $this->runBlockGamut($this->outdent($def . "\n\n"));
-			$def = "\n". $def ."\n";
-		}
-		else {
-			$def = rtrim($def);
-			$def = $this->runSpanGamut($this->outdent($def));
-		}
-
-		return "\n<dd>" . $def . "</dd>\n";
-	}
-
-	/**
-	 * Adding the fenced code block syntax to regular Markdown:
-	 *
-	 * ~~~
-	 * Code block
-	 * ~~~
-	 * 
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doFencedCodeBlocks($text) {
-	
-		$less_than_tab = $this->tab_width;
-		
-		$text = preg_replace_callback('{
-				(?:\n|\A)
-				# 1: Opening marker
-				(
-					(?:~{3,}|`{3,}) # 3 or more tildes/backticks.
-				)
-				[ ]*
-				(?:
-					\.?([-_:a-zA-Z0-9]+) # 2: standalone class name
-				)?
-				[ ]*
-				(?:
-					' . $this->id_class_attr_catch_re . ' # 3: Extra attributes
-				)?
-				[ ]* \n # Whitespace and newline following marker.
-				
-				# 4: Content
-				(
-					(?>
-						(?!\1 [ ]* \n)	# Not a closing marker.
-						.*\n+
-					)+
-				)
-				
-				# Closing marker.
-				\1 [ ]* (?= \n )
-			}xm',
-			array($this, '_doFencedCodeBlocks_callback'), $text);
-
-		return $text;
-	}
-
-	/**
-	 * Callback to process fenced code blocks
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doFencedCodeBlocks_callback($matches) {
-		$classname =& $matches[2];
-		$attrs     =& $matches[3];
-		$codeblock = $matches[4];
-
-		if ($this->code_block_content_func) {
-			$codeblock = call_user_func($this->code_block_content_func, $codeblock, $classname);
-		} else {
-			$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
-		}
-
-		$codeblock = preg_replace_callback('/^\n+/',
-			array($this, '_doFencedCodeBlocks_newlines'), $codeblock);
-
-		$classes = array();
-		if ($classname != "") {
-			if ($classname{0} == '.')
-				$classname = substr($classname, 1);
-			$classes[] = $this->code_class_prefix . $classname;
-		}
-		$attr_str = $this->doExtraAttributes($this->code_attr_on_pre ? "pre" : "code", $attrs, null, $classes);
-		$pre_attr_str  = $this->code_attr_on_pre ? $attr_str : '';
-		$code_attr_str = $this->code_attr_on_pre ? '' : $attr_str;
-		$codeblock  = "<pre$pre_attr_str><code$code_attr_str>$codeblock</code></pre>";
-		
-		return "\n\n".$this->hashBlock($codeblock)."\n\n";
-	}
-
-	/**
-	 * Replace new lines in fenced code blocks
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doFencedCodeBlocks_newlines($matches) {
-		return str_repeat("<br$this->empty_element_suffix", 
-			strlen($matches[0]));
-	}
-
-	/**
-	 * Redefining emphasis markers so that emphasis by underscore does not
-	 * work in the middle of a word.
-	 * @var array
-	 */
-	protected $em_relist = array(
-		''  => '(?:(?<!\*)\*(?!\*)|(?<![a-zA-Z0-9_])_(?!_))(?![\.,:;]?\s)',
-		'*' => '(?<![\s*])\*(?!\*)',
-		'_' => '(?<![\s_])_(?![a-zA-Z0-9_])',
-	);
-	protected $strong_relist = array(
-		''   => '(?:(?<!\*)\*\*(?!\*)|(?<![a-zA-Z0-9_])__(?!_))(?![\.,:;]?\s)',
-		'**' => '(?<![\s*])\*\*(?!\*)',
-		'__' => '(?<![\s_])__(?![a-zA-Z0-9_])',
-	);
-	protected $em_strong_relist = array(
-		''    => '(?:(?<!\*)\*\*\*(?!\*)|(?<![a-zA-Z0-9_])___(?!_))(?![\.,:;]?\s)',
-		'***' => '(?<![\s*])\*\*\*(?!\*)',
-		'___' => '(?<![\s_])___(?![a-zA-Z0-9_])',
-	);
-
-	/**
-	 * Parse text into paragraphs
-	 * @param  string $text String to process in paragraphs
-	 * @param  boolean $wrap_in_p Whether paragraphs should be wrapped in <p> tags
-	 * @return string       HTML output
-	 */
-	protected function formParagraphs($text, $wrap_in_p = true) {
-		// Strip leading and trailing lines:
-		$text = preg_replace('/\A\n+|\n+\z/', '', $text);
-
-		$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
-
-		// Wrap <p> tags and unhashify HTML blocks
-		foreach ($grafs as $key => $value) {
-			$value = trim($this->runSpanGamut($value));
-			
-			// Check if this should be enclosed in a paragraph.
-			// Clean tag hashes & block tag hashes are left alone.
-			$is_p = $wrap_in_p && !preg_match('/^B\x1A[0-9]+B|^C\x1A[0-9]+C$/', $value);
-			
-			if ($is_p) {
-				$value = "<p>$value</p>";
-			}
-			$grafs[$key] = $value;
-		}
-		
-		// Join grafs in one text, then unhash HTML tags. 
-		$text = implode("\n\n", $grafs);
-		
-		// Finish by removing any tag hashes still present in $text.
-		$text = $this->unhash($text);
-		
-		return $text;
-	}
-	
-	
-	/**
-	 * Footnotes - Strips link definitions from text, stores the URLs and
-	 * titles in hash references.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function stripFootnotes($text) {
-		$less_than_tab = $this->tab_width - 1;
-
-		// Link defs are in the form: [^id]: url "optional title"
-		$text = preg_replace_callback('{
-			^[ ]{0,' . $less_than_tab . '}\[\^(.+?)\][ ]?:	# note_id = $1
-			  [ ]*
-			  \n?					# maybe *one* newline
-			(						# text = $2 (no blank lines allowed)
-				(?:					
-					.+				# actual text
-				|
-					\n				# newlines but 
-					(?!\[.+?\][ ]?:\s)# negative lookahead for footnote or link definition marker.
-					(?!\n+[ ]{0,3}\S)# ensure line is not blank and followed 
-									# by non-indented content
-				)*
-			)		
-			}xm',
-			array($this, '_stripFootnotes_callback'),
-			$text);
-		return $text;
-	}
-
-	/**
-	 * Callback for stripping footnotes
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _stripFootnotes_callback($matches) {
-		$note_id = $this->fn_id_prefix . $matches[1];
-		$this->footnotes[$note_id] = $this->outdent($matches[2]);
-		return ''; // String that will replace the block
-	}
-
-	/**
-	 * Replace footnote references in $text [^id] with a special text-token 
-	 * which will be replaced by the actual footnote marker in appendFootnotes.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doFootnotes($text) {
-		if (!$this->in_anchor) {
-			$text = preg_replace('{\[\^(.+?)\]}', "F\x1Afn:\\1\x1A:", $text);
-		}
-		return $text;
-	}
-
-	/**
-	 * Append footnote list to text
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function appendFootnotes($text) {
-		$text = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', 
-			array($this, '_appendFootnotes_callback'), $text);
-	
-		if (!empty($this->footnotes_ordered)) {
-			$text .= "\n\n";
-			$text .= "<div class=\"footnotes\">\n";
-			$text .= "<hr" . $this->empty_element_suffix . "\n";
-			$text .= "<ol>\n\n";
-
-			$attr = "";
-			if ($this->fn_backlink_class != "") {
-				$class = $this->fn_backlink_class;
-				$class = $this->encodeAttribute($class);
-				$attr .= " class=\"$class\"";
-			}
-			if ($this->fn_backlink_title != "") {
-				$title = $this->fn_backlink_title;
-				$title = $this->encodeAttribute($title);
-				$attr .= " title=\"$title\"";
-			}
-			$backlink_text = $this->fn_backlink_html;
-			$num = 0;
-			
-			while (!empty($this->footnotes_ordered)) {
-				$footnote = reset($this->footnotes_ordered);
-				$note_id = key($this->footnotes_ordered);
-				unset($this->footnotes_ordered[$note_id]);
-				$ref_count = $this->footnotes_ref_count[$note_id];
-				unset($this->footnotes_ref_count[$note_id]);
-				unset($this->footnotes[$note_id]);
-				
-				$footnote .= "\n"; // Need to append newline before parsing.
-				$footnote = $this->runBlockGamut("$footnote\n");				
-				$footnote = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', 
-					array($this, '_appendFootnotes_callback'), $footnote);
-				
-				$attr = str_replace("%%", ++$num, $attr);
-				$note_id = $this->encodeAttribute($note_id);
-
-				// Prepare backlink, multiple backlinks if multiple references
-				$backlink = "<a href=\"#fnref:$note_id\"$attr>$backlink_text</a>";
-				for ($ref_num = 2; $ref_num <= $ref_count; ++$ref_num) {
-					$backlink .= " <a href=\"#fnref$ref_num:$note_id\"$attr>$backlink_text</a>";
-				}
-				// Add backlink to last paragraph; create new paragraph if needed.
-				if (preg_match('{</p>$}', $footnote)) {
-					$footnote = substr($footnote, 0, -4) . "&#160;$backlink</p>";
-				} else {
-					$footnote .= "\n\n<p>$backlink</p>";
-				}
-				
-				$text .= "<li id=\"fn:$note_id\">\n";
-				$text .= $footnote . "\n";
-				$text .= "</li>\n\n";
-			}
-			
-			$text .= "</ol>\n";
-			$text .= "</div>";
-		}
-		return $text;
-	}
-
-	/**
-	 * Callback for appending footnotes
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _appendFootnotes_callback($matches) {
-		$node_id = $this->fn_id_prefix . $matches[1];
-		
-		// Create footnote marker only if it has a corresponding footnote *and*
-		// the footnote hasn't been used by another marker.
-		if (isset($this->footnotes[$node_id])) {
-			$num =& $this->footnotes_numbers[$node_id];
-			if (!isset($num)) {
-				// Transfer footnote content to the ordered list and give it its
-				// number
-				$this->footnotes_ordered[$node_id] = $this->footnotes[$node_id];
-				$this->footnotes_ref_count[$node_id] = 1;
-				$num = $this->footnote_counter++;
-				$ref_count_mark = '';
-			} else {
-				$ref_count_mark = $this->footnotes_ref_count[$node_id] += 1;
-			}
-
-			$attr = "";
-			if ($this->fn_link_class != "") {
-				$class = $this->fn_link_class;
-				$class = $this->encodeAttribute($class);
-				$attr .= " class=\"$class\"";
-			}
-			if ($this->fn_link_title != "") {
-				$title = $this->fn_link_title;
-				$title = $this->encodeAttribute($title);
-				$attr .= " title=\"$title\"";
-			}
-			
-			$attr = str_replace("%%", $num, $attr);
-			$node_id = $this->encodeAttribute($node_id);
-			
-			return
-				"<sup id=\"fnref$ref_count_mark:$node_id\">".
-				"<a href=\"#fn:$node_id\"$attr>$num</a>".
-				"</sup>";
-		}
-		
-		return "[^" . $matches[1] . "]";
-	}
-		
-	
-	/**
-	 * Abbreviations - strips abbreviations from text, stores titles in hash
-	 * references.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function stripAbbreviations($text) {
-		$less_than_tab = $this->tab_width - 1;
-
-		// Link defs are in the form: [id]*: url "optional title"
-		$text = preg_replace_callback('{
-			^[ ]{0,' . $less_than_tab . '}\*\[(.+?)\][ ]?:	# abbr_id = $1
-			(.*)					# text = $2 (no blank lines allowed)	
-			}xm',
-			array($this, '_stripAbbreviations_callback'),
-			$text);
-		return $text;
-	}
-
-	/**
-	 * Callback for stripping abbreviations
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _stripAbbreviations_callback($matches) {
-		$abbr_word = $matches[1];
-		$abbr_desc = $matches[2];
-		if ($this->abbr_word_re) {
-			$this->abbr_word_re .= '|';
-		}
-		$this->abbr_word_re .= preg_quote($abbr_word);
-		$this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
-		return ''; // String that will replace the block
-	}
-
-	/**
-	 * Find defined abbreviations in text and wrap them in <abbr> elements.
-	 * @param  string $text
-	 * @return string
-	 */
-	protected function doAbbreviations($text) {
-		if ($this->abbr_word_re) {
-			// cannot use the /x modifier because abbr_word_re may 
-			// contain significant spaces:
-			$text = preg_replace_callback('{' .
-				'(?<![\w\x1A])' .
-				'(?:' . $this->abbr_word_re . ')' .
-				'(?![\w\x1A])' .
-				'}',
-				array($this, '_doAbbreviations_callback'), $text);
-		}
-		return $text;
-	}
-
-	/**
-	 * Callback for processing abbreviations
-	 * @param  array $matches
-	 * @return string
-	 */
-	protected function _doAbbreviations_callback($matches) {
-		$abbr = $matches[0];
-		if (isset($this->abbr_desciptions[$abbr])) {
-			$desc = $this->abbr_desciptions[$abbr];
-			if (empty($desc)) {
-				return $this->hashPart("<abbr>$abbr</abbr>");
-			} else {
-				$desc = $this->encodeAttribute($desc);
-				return $this->hashPart("<abbr title=\"$desc\">$abbr</abbr>");
-			}
-		} else {
-			return $matches[0];
-		}
-	}
-}
diff --git a/library/php-markdown/Michelf/MarkdownInterface.inc.php b/library/php-markdown/Michelf/MarkdownInterface.inc.php
deleted file mode 100644
index c4e9ac7f6..000000000
--- a/library/php-markdown/Michelf/MarkdownInterface.inc.php
+++ /dev/null
@@ -1,9 +0,0 @@
-<?php
-
-// Use this file if you cannot use class autoloading. It will include all the
-// files needed for the MarkdownInterface interface.
-//
-// Take a look at the PSR-0-compatible class autoloading implementation
-// in the Readme.php file if you want a simple autoloader setup.
-
-require_once dirname(__FILE__) . '/MarkdownInterface.php';
diff --git a/library/php-markdown/Michelf/MarkdownInterface.php b/library/php-markdown/Michelf/MarkdownInterface.php
deleted file mode 100644
index 8512e3753..000000000
--- a/library/php-markdown/Michelf/MarkdownInterface.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-/**
- * Markdown  -  A text-to-HTML conversion tool for web writers
- *
- * @package   php-markdown
- * @author    Michel Fortin <michel.fortin@michelf.com>
- * @copyright 2004-2016 Michel Fortin <https://michelf.com/projects/php-markdown/>
- * @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
- */
-
-namespace Michelf;
-
-/**
- * Markdown Parser Interface 
- */
-interface MarkdownInterface {
-	/**
-	 * Initialize the parser and return the result of its transform method.
-	 * This will work fine for derived classes too.
-	 *
-	 * @api
-	 *
-	 * @param  string $text
-	 * @return string
-	 */
-	public static function defaultTransform($text);
-
-	/**
-	 * Main function. Performs some preprocessing on the input text
-	 * and pass it through the document gamut.
-	 *
-	 * @api
-	 *
-	 * @param  string $text
-	 * @return string
-	 */
-	public function transform($text);
-}
diff --git a/library/php-markdown/Readme.md b/library/php-markdown/Readme.md
deleted file mode 100644
index 63e8c1ece..000000000
--- a/library/php-markdown/Readme.md
+++ /dev/null
@@ -1,384 +0,0 @@
-PHP Markdown
-============
-
-PHP Markdown Lib 1.7.0 - 29 Oct 2016
-
-by Michel Fortin  
-<https://michelf.ca/>
-
-based on Markdown by John Gruber  
-<https://daringfireball.net/>
-
-
-Introduction
-------------
-
-This is a library package that includes the PHP Markdown parser and its 
-sibling PHP Markdown Extra with additional features.
-
-Markdown is a text-to-HTML conversion tool for web writers. Markdown
-allows you to write using an easy-to-read, easy-to-write plain text
-format, then convert it to structurally valid XHTML (or HTML).
-
-"Markdown" is actually two things: a plain text markup syntax, and a 
-software tool, originally written in Perl, that converts the plain text 
-markup to HTML. PHP Markdown is a port to PHP of the original Markdown 
-program by John Gruber.
-
-*	[Full documentation of the Markdown syntax](<https://daringfireball.net/projects/markdown/>)  
-	— Daring Fireball (John Gruber)
-*	[Markdown Extra syntax additions](<https://michelf.ca/projects/php-markdown/extra/>)  
-	— Michel Fortin
-
-
-Requirement
------------
-
-This library package requires PHP 5.3 or later.
-
-Note: The older plugin/library hybrid package for PHP Markdown and
-PHP Markdown Extra is still maintained and will work with PHP 4.0.5 and later.
-
-Before PHP 5.3.7, pcre.backtrack_limit defaults to 100 000, which is too small
-in many situations. You might need to set it to higher values. Later PHP 
-releases defaults to 1 000 000, which is usually fine.
-
-
-Usage
------
-
-This library package is meant to be used with class autoloading. For autoloading 
-to work, your project needs have setup a PSR-0-compatible autoloader. See the 
-included Readme.php file for a minimal autoloader setup. (If you cannot use 
-autoloading, see below.)
-
-With class autoloading in place, putting the 'Michelf' folder in your 
-include path should be enough for this to work:
-
-	use \Michelf\Markdown;
-	$my_html = Markdown::defaultTransform($my_text);
-
-Markdown Extra syntax is also available the same way:
-
-	use \Michelf\MarkdownExtra;
-	$my_html = MarkdownExtra::defaultTransform($my_text);
-
-If you wish to use PHP Markdown with another text filter function 
-built to parse HTML, you should filter the text *after* the `transform`
-function call. This is an example with [PHP SmartyPants][psp]:
-
-	use \Michelf\Markdown, \Michelf\SmartyPants;
-	$my_html = Markdown::defaultTransform($my_text);
-	$my_html = SmartyPants::defaultTransform($my_html);
-
-All these examples are using the static `defaultTransform` static function 
-found inside the parser class. If you want to customize the parser 
-configuration, you can also instantiate it directly and change some 
-configuration variables:
-
-	use \Michelf\MarkdownExtra;
-	$parser = new MarkdownExtra;
-	$parser->fn_id_prefix = "post22-";
-	$my_html = $parser->transform($my_text);
-
-To learn more, see the full list of [configuration variables].
-
- [configuration variables]: https://michelf.ca/projects/php-markdown/configuration/
-
-
-### Usage without an autoloader
-
-If you cannot use class autoloading, you can still use `include` or `require` 
-to access the parser. To load the `\Michelf\Markdown` parser, do it this way:
-
-	require_once 'Michelf/Markdown.inc.php';
-
-Or, if you need the `\Michelf\MarkdownExtra` parser:
-
-	require_once 'Michelf/MarkdownExtra.inc.php';
-
-While the plain `.php` files depend on autoloading to work correctly, using the
-`.inc.php` files instead will eagerly load the dependencies that would be 
-loaded on demand if you were using autoloading.
-
-
-Public API and Versioning Policy
----------------------------------
-
-Version numbers are of the form *major*.*minor*.*patch*.
-
-The public API of PHP Markdown consist of the two parser classes `Markdown`
-and `MarkdownExtra`, their constructors, the `transform` and `defaultTransform`
-functions and their configuration variables. The public API is stable for
-a given major version number. It might get additions when the minor version
-number increments.
-
-**Protected members are not considered public API.** This is unconventional 
-and deserves an explanation. Incrementing the major version number every time 
-the underlying implementation of something changes is going to give
-nonessential version numbers for the vast majority of people who just use the
-parser.  Protected members are meant to create parser subclasses that behave in
-different ways. Very few people create parser subclasses. I don't want to 
-discourage it by making everything private, but at the same time I can't 
-guarantee any stable hook between versions if you use protected members.
-
-**Syntax changes** will increment the minor number for new features, and the 
-patch number for small corrections. A *new feature* is something that needs a 
-change in the syntax documentation. Note that since PHP Markdown Lib includes
-two parsers, a syntax change for either of them will increment the minor 
-number. Also note that there is nothing perfectly backward-compatible with the
-Markdown syntax: all inputs are always valid, so new features always replace
-something that was previously legal, although generally nonsensical to do.
-
-
-Bugs
-----
-
-To file bug reports please send email to:
-<michel.fortin@michelf.ca>
-
-Please include with your report: (1) the example input; (2) the output you
-expected; (3) the output PHP Markdown actually produced.
-
-If you have a problem where Markdown gives you an empty result, first check 
-that the backtrack limit is not too low by running `php --info | grep pcre`.
-See Installation and Requirement above for details.
-
-
-Development and Testing
------------------------
-
-Pull requests for fixing bugs are welcome. Proposed new features are
-going to be meticulously reviewed -- taking into account backward compatibility, 
-potential side effects, and future extensibility -- before deciding on
-acceptance or rejection.
-
-If you make a pull request that includes changes to the parser please add 
-tests for what is being changed to [MDTest][] and make a pull request there 
-too.
-
- [MDTest]: https://github.com/michelf/mdtest/
-
-
-Donations
----------
-
-If you wish to make a donation that will help me devote more time to 
-PHP Markdown, please visit [michelf.ca/donate] or send Bitcoin to
-[1HiuX34czvVPPdhXbUAsAu7pZcesniDCGH].
-
- [michelf.ca/donate]: https://michelf.ca/donate/#!Thanks%20for%20PHP%20Markdown
- [1HiuX34czvVPPdhXbUAsAu7pZcesniDCGH]: bitcoin:1HiuX34czvVPPdhXbUAsAu7pZcesniDCGH
-
-
-Version History
----------------
-
-PHP Markdown Lib 1.7.0 (29 Oct 2016)
-
-*	Added a `hard_wrap` configuration variable to make all newline characters 
-	in the text become `<br>` tags in the HTML output. By default, according 
-	to the standard Markdown syntax these newlines are ignored unless they a 
-	preceded by two spaces. Thanks to Jonathan Cohlmeyer for the implementation.
-
-*	Improved the parsing of list items to fix problematic cases that came to 
-	light with the addition of `hard_wrap`. This should have no effect on the 
-	output except span-level list items that ended with two spaces (and thus 
-	ended with a line break).
-
-*	Added a `code_span_content_func` configuration variable which takes a 
-	function that will convert the content of the code span to HTML. This can
-	be useful to implement syntax highlighting. Although contrary to its 
-	code block equivalent, there is no syntax for specifying a language. 
-	Credits to styxit for the implementation.
-
-*	Fixed a Markdown Extra issue where two-space-at-end-of-line hard breaks 
-	wouldn't work inside of HTML block elements such as `<p markdown="1">` 
-	where the element expects only span-level content.
-
-*	In the parser code, switched to PHPDoc comment format. Thanks to 
-	Robbie Averill for the help.
-
-
-PHP Markdown Lib 1.6.0 (23 Dec 2015)  
-
-Note: this version was incorrectly released as 1.5.1 on Dec 22, a number 
-that contradicted the versioning policy.
-
-*	For fenced code blocks in Markdown Extra, can now set a class name for the 
-	code block's language before the special attribute block. Previously, this 
-	class name was only allowed in the absence of the special attribute block.
-
-*	Added a `code_block_content_func` configuration variable which takes a 
-	function that will convert the content of the code block to HTML. This is 
-	most useful for syntax highlighting. For fenced code blocks in Markdown 
-	Extra, the function has access to the language class name (the one outside 
-	of the special attribute block). Credits to Mario Konrad for providing the 
-	implementation.
-
-*	The curled arrow character for the backlink in footnotes is now followed
-	by a Unicode variant selector to prevent it from being displayed in emoji
-	form on iOS.
-
-	Note that in older browsers the variant selector is often interpreted as a 
-	separate character, making it visible after the arrow. So there is now a 
-	also a `fn_backlink_html` configuration variable that can be used to set 
-	the link text to something else. Credits to Dana for providing the 
-	implementation.
-
-*	Fixed an issue in MarkdownExtra where long header lines followed by a
-	special attribute block would hit the backtrack limit an cause an empty
-	string to be returned.
-
-
-PHP Markdown Lib 1.5.0 (1 Mar 2015)
-
-*	Added the ability start ordered lists with a number different from 1 and
-	and have that reflected in the HTML output. This can be enabled with
-	the `enhanced_ordered_lists` configuration variable for the Markdown 
-	parser; it is enabled by default for Markdown Extra.
-	Credits to Matt Gorle for providing the implementation.
-
-*	Added the ability to insert custom HTML attributes with simple values 
-	everywhere an extra attribute block is allowed (links, images, headers).
-	The value must be unquoted, cannot contains spaces and is limited to 
-	alphanumeric ASCII characters.
-	Credits to Peter Droogmans for providing the implementation.
-
-*	Added a `header_id_func` configuration variable which takes a function
-	that can generate an `id` attribute value from the header text.
-	Credits to Evert Pot for providing the implementation.
-
-*	Added a `url_filter_func` configuration variable which takes a function
-	that can rewrite any link or image URL to something different.
-
-
-PHP Markdown Lib 1.4.1 (4 May 2014)
-
-*	The HTML block parser will now treat `<figure>` as a block-level element
-	(as it should) and no longer wrap it in `<p>` or parse it's content with 
-	the as Markdown syntax (although with Extra you can use `markdown="1"`
-	if you wish to use the Markdown syntax inside it).
-
-*	The content of `<style>` elements will now be left alone, its content
-	won't be interpreted as Markdown.
-
-*	Corrected an bug where some inline links with spaces in them would not
-	work even when surounded with angle brackets:
-	
-		[link](<s p a c e s>)
-
-*	Fixed an issue where email addresses with quotes in them would not always
-	have the quotes escaped in the link attribute, causing broken links (and
-	invalid HTML).
-
-*	Fixed the case were a link definition following a footnote definition would
-	be swallowed by the footnote unless it was separated by a blank line.
-
-
-PHP Markdown Lib 1.4.0 (29 Nov 2013)
-
-*	Added support for the `tel:` URL scheme in automatic links.
-
-		<tel:+1-111-111-1111>
-	
-	It gets converted to this (note the `tel:` prefix becomes invisible):
-	
-		<a href="tel:+1-111-111-1111">+1-111-111-1111</a>
-
-*	Added backtick fenced code blocks to MarkdownExtra, originally from
-	Github-Flavored Markdown.
-
-*	Added an interface called MarkdownInterface implemented by both
-	the Markdown and MarkdownExtra parsers. You can use the interface if
-	you want to create a mockup parser object for unit testing.
-
-*	For those of you who cannot use class autoloading, you can now
-	include `Michelf/Markdown.inc.php` or `Michelf/MarkdownExtra.inc.php` (note 
-	the 	`.inc.php` extension) to automatically include other files required
-	by the parser.
-
-
-PHP Markdown Lib 1.3 (11 Apr 2013)
-
-This is the first release of PHP Markdown Lib. This package requires PHP 
-version 5.3 or later and is designed to work with PSR-0 autoloading and, 
-optionally with Composer. Here is a list of the changes since 
-PHP Markdown Extra 1.2.6:
-
-*	Plugin interface for WordPress and other systems is no longer present in
-	the Lib package. The classic package is still available if you need it:
-	<https://michelf.ca/projects/php-markdown/classic/>
-
-*	Added `public` and `protected` protection attributes, plus a section about
-	what is "public API" and what isn't in the Readme file.
-
-*	Changed HTML output for footnotes: now instead of adding `rel` and `rev`
-	attributes, footnotes links have the class name `footnote-ref` and
-	backlinks `footnote-backref`.
-
-*	Fixed some regular expressions to make PCRE not shout warnings about POSIX
-	collation classes (dependent on your version of PCRE).
-
-*	Added optional class and id attributes to images and links using the same
-	syntax as for headers:
-
-		[link](url){#id .class}  
-		![img](url){#id .class}
-	
-	It work too for reference-style links and images. In this case you need
-	to put those attributes at the reference definition:
-
-		[link][linkref] or [linkref]  
-		![img][linkref]
-		
-		[linkref]: url "optional title" {#id .class}
-
-*	Fixed a PHP notice message triggered when some table column separator 
-	markers are missing on the separator line below column headers.
-
-*	Fixed a small mistake that could cause the parser to retain an invalid
-	state related to parsing links across multiple runs. This was never 
-	observed (that I know of), but it's still worth fixing.
-
-
-Copyright and License
----------------------
-
-PHP Markdown Lib
-Copyright (c) 2004-2016 Michel Fortin
-<https://michelf.ca/>  
-All rights reserved.
-
-Based on Markdown  
-Copyright (c) 2003-2005 John Gruber   
-<https://daringfireball.net/>   
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-*   Redistributions of source code must retain the above copyright 
-    notice, this list of conditions and the following disclaimer.
-
-*   Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in the
-    documentation and/or other materials provided with the 
-    distribution.
-
-*   Neither the name "Markdown" nor the names of its contributors may
-    be used to endorse or promote products derived from this software
-    without specific prior written permission.
-
-This software is provided by the copyright holders and contributors "as
-is" and any express or implied warranties, including, but not limited
-to, the implied warranties of merchantability and fitness for a
-particular purpose are disclaimed. In no event shall the copyright owner
-or contributors be liable for any direct, indirect, incidental, special,
-exemplary, or consequential damages (including, but not limited to,
-procurement of substitute goods or services; loss of use, data, or
-profits; or business interruption) however caused and on any theory of
-liability, whether in contract, strict liability, or tort (including
-negligence or otherwise) arising in any way out of the use of this
-software, even if advised of the possibility of such damage.
diff --git a/library/php-markdown/Readme.php b/library/php-markdown/Readme.php
deleted file mode 100644
index 89449dea4..000000000
--- a/library/php-markdown/Readme.php
+++ /dev/null
@@ -1,31 +0,0 @@
-<?php
-
-// This file passes the content of the Readme.md file in the same directory
-// through the Markdown filter. You can adapt this sample code in any way
-// you like.
-
-// Install PSR-0-compatible class autoloader
-spl_autoload_register(function($class){
-	require preg_replace('{\\\\|_(?!.*\\\\)}', DIRECTORY_SEPARATOR, ltrim($class, '\\')).'.php';
-});
-
-// Get Markdown class
-use \Michelf\Markdown;
-
-// Read file and pass content through the Markdown parser
-$text = file_get_contents('Readme.md');
-$html = Markdown::defaultTransform($text);
-
-?>
-<!DOCTYPE html>
-<html>
-    <head>
-        <title>PHP Markdown Lib - Readme</title>
-    </head>
-    <body>
-		<?php
-			// Put HTML content in the document
-			echo $html;
-		?>
-    </body>
-</html>
diff --git a/library/php-markdown/composer.json b/library/php-markdown/composer.json
deleted file mode 100644
index c219e543c..000000000
--- a/library/php-markdown/composer.json
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-	"name": "michelf/php-markdown",
-	"type": "library",
-	"description": "PHP Markdown",
-	"homepage": "https://michelf.ca/projects/php-markdown/",
-	"keywords": ["markdown"],
-	"license": "BSD-3-Clause",
-	"authors": [
-		{
-			"name": "Michel Fortin",
-			"email": "michel.fortin@michelf.ca",
-			"homepage": "https://michelf.ca/",
-			"role": "Developer"
-		},
-		{
-			"name": "John Gruber",
-			"homepage": "https://daringfireball.net/"
-		}
-	],
-	"require": {
-		"php": ">=5.3.0"
-	},
-	"autoload": {
- 		"psr-0": { "Michelf": "" }
-	}
-}