Notifications for player join/leave use player's username. Added notification when player wins a round
Added notifications specifying if the Czar left, winner autopicked, non-czar player left.
Merge branch 'master' of https://github.com/cardsforhumanity/cardsforhumanity

Conflicts:
	config/socket/socket.js
Merge pull request #43 from silversteez/master

Better notifications!