Changed tab headings to black
- Made all tab fragments - speakers, agenda, about.  (Getting an error I can't fix yet)
- Removed action bars and menus on all screens other than home tabbed screen (I think, can't run it to check yet)
- Removed code and classes no longer used. (Still need to make some base classes to eliminate redundant code everywhere)
- Still need to put sponsors in the about screen and delete the sponsors code.
- Made sponsors into a fragment and added it to the about activity
- Deleted obsolete activities from the manifest file