Remove the packaged release autoloader

Because this file is only relevant for the packaged release it's being moved to the utils project.

Author: bsweeney

autoload.inc.php

@@ -465,7 +465,7 @@ public function loadHtml($str, $encoding = 'UTF-8')
         // https://developer.mozilla.org/en/mozilla's_quirks_mode
         $quirksmode = false;
 
-        if ($this->options->isHtml5ParserEnabled()) {
+        if ($this->options->isHtml5ParserEnabled() && class_exists("HTML5_Tokenizer", false)) {
             $tokenizer = new HTML5_Tokenizer($str);
             $tokenizer->parse();
             $doc = $tokenizer->save();