Fixed post.url wasn't returning full URL

The new Twig sytnax requires methods to be passed with parenthesis.
Extensions Filesystem Reorganization

Feathers, Modules and Themes now all live under a new directory called "contents".

Uploads directory too.
Updated URLs on Audio Feather.

Cleaned up two methods.
Refactored Random() method.

Added body_class to few methods for CSS styling.
Completely placed recaptcha as a Module.
General code cleanup.