Further Implementation of Registry and Namespaces.

Updated README

Renamed $REGISTRY to $Registry

Now Creating the Nav in the config
    The Nav object is created and then added to the Registry in config.php.

Created resources/php/home_controller.php
    Using this file to hold the home page's logic. I modified home to conform
    to this - the general - scheme.

Deleted get_excerpts Function from controller.php
    Moved it (as it was part of home's logic) to home_controller.php.

Removed Global Referances to DB Variable set in controller.php
    Now referances the Registry for the DB.