Full theme support

Themes were the main update today. Not only were themes implemented in
full, but Gltn modularized as more parts could be directly modified
through a theme.
Additionally bugs and ux fixes were made that were made apparent while
navigating in different themes.
-Themes is officially launched (oddly being the last, but the simplest,
thing to be coded)
-Themes get a UI to select them
-Themes were added to the store, plus install/uninstall capabilty
-Improvements to the Blackout Theme
-New Blackout Condensed Theme using Roboto Condensed
-Store search is improved