SING-90: Users can now register via Youtube OAuth2. SING-86: Users use their Youtube name as their display name. SING-87: Users have avatars via Google+.
SING-81: Changed Django REST Framework's Permissions to work for any authenticated user. Song "Edit" palette no longer appears for non-authenticated users. A little progress on SongState model.
SING-81: song.html now renders songState onto the page.
SING-81: SongState model can now be PUT to by ID.
SING-81: Users can now save Song Learn State.
SING-81: Added Song Learn State overlay to song covers.
SING-81: songs.html now renders Song Learn State.
SING-82: Users can now favorite songs.
SING-69: Ghetto-styling that recycle bin! Fixed bug where setSongStatus(null) returned HTTP 500.
SING-80: Ghetto styling droppable chords  B-)