install procedure as a wizard
graphical rappresentation of passed/unpassed system checks
db connection test don't try anymore to create the db
admin email and timezone are asked in a separate pass
fix loading of database.sql, removing comments from phpmyadmin export
fix check for .htconfig.php writability
ask for php-cli path if not found in PATH
install_db.tpl use field_* templates to render the form
Fabio Comuni