Use FirebaseSimpleLogin to get rid of deprecation warning
Make number of votes and voter sentence live update

 * I had to introduce a bit of an ugly hack for ember-data proper to get rid of the "Attempted to handle x in state y" error messages.
 * Also, it seems like there is no time limit now to undo the vote
Fix timed undoVote
Make voteCount more robust
Merge branch 'live-relationships'