NavBar Drawer

Not 100% sure it's right, but the actionbar seems clunky.
WIP/Safety commit

* Added a 'basic' Nav Drawer (not working yet)
* Switched to v7 support library for a bunch of stuff, FragmentActivity etc
* Switched to styles for a bunch of stuff
Fix up the Drawer Navigation to be functional

Also add lots of icons and fiddle with styles a bit!
Attempt to integrate ParseLoginUI

Super unsuccessful.