demand markup files to have one of the following extensions to get parsed (avoiding processing of .bak files etc): .php (but not .inc.php), .htm, .html, .css and .js
demand markup files to have one of the following extensions to get parsed (avoiding processing of .bak files etc): .php (but not .inc.php), .htm, .html, .css and .js
fixed testPageNotFound: get_page_info now returns null instead of throwing an exception