Add some code comments to the example.

example.php

@@ -1,8 +1,14 @@
 <?php
 
+//Add the auto loader. This makes sure that we can find the files we need for a class.
 require_once('autoload.php');
 
+//This says, we want Hello to mean Friendica\Directory\Example\Hello.
+//It's a shortcut.
 use Friendica\Directory\Example\Hello;
 
+//Here we use the shortcut and create a new Hello object.
 $instance = new Hello();
+
+//Let the Hello object call 
 echo $instance->sayHello();