Cleaned up the themes folder since it did not need the additional folder
depth to manage bundled scripts anymore. Updated the theme engine
accordingly.
Styling was a bit stale, so I ovehauled them to use native CSS,
eliminating the need for pre-processors.
The overall framework was old and convoluted so that needed to be
updated to streamline how styles are being applied.
There's still some work to do but the base is so much cleaner now.
