Moving main files into 'model-controller' directory as they are a combination of model and controllers.
Renaming 'Util.php' to 'Utility.php'
Updating auto-loader to handle new (default) location for main files.
Fixing inverted logic for Sites::version().
Fixing inverted logic for Sites::version().
Merge branch 'dev-dirs' into dev
Merge branch 'dev' of github.com:nZEDb/nZEDb into dev
Updating Changelog.