Fixed bug with socket.js where node crashes when a user picks a card without being in a game room.
Short-circuiting judging time when czar finishes picking a card before time limit
Confirming player hasn't previously submitted a card.
Disabling any action if player isn't in game or if card isn't in player's hand.
Added comments to variables in game class. Ending game when point limit is reached
Limiting cards to official decks
Merge branch 'master' of https://github.com/cardsforhumanity/cardsforhumanity
Merge pull request #26 from mrngoitall/master

Added more backend game logic to check previous card picks to prevent cheating. Ending game at point limit.