Hotfix: correct login activity background for APIs < 19
Merge release v2.1.2 into master
Merge release v2.1.2 into master
Merge remote-tracking branch 'origin/master'

Conflicts:
	APO-DZ/build.gradle
Upgrade QuickReturnBar to makovkastar's FloatingActionButton implementation; add ButterKnife
Fix reversed subtitles in alumni directory
Fix subtitle hiding/unhiding with NavDrawer
Ensure data doesn't go stale
Use filtered data source
Beta release 2.2.1