Lots of refactoring and fixes.

* Fixed post.url wasn't returning full URL
* Extensions Filesystem Reorganization
* Updated URLs on Audio Feather. (Refactored methods)
* Refactored Random() method.
* Added body_class to few methods for CSS styling.
* Moved recaptcha as a Module.
* Fixed a potential XSS vulnerability.
* Fix Chyrp Twig 'url' tag.
* Patched an XSS and SQL vulnerability.