PHPTests for the DOMDocument::loadHTMLfile method.
They cover
- The basic behaviour
- When the method receives as argument a file which doesn't exist
- When the argument is an empty string
- When an empty file is loaded
- When a not-well formed html file is loaded

It also includes 2 auxilary files
- An empty html file
- A not well formed html file
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  PHPTests for the DOMDocument::loadHTMLfile method. They cover - The basic behaviour - When the method receives as argument a file which doesn't exist - When the argument is an empty string - When an empty file is loaded - When a not-well formed html file is loaded