register via enter key

and some bug fixes
stability enhancements and key support

* random fuse length 5-20 seconds
* emit roundEnd to all players with data about the looser of the game after the bomb exploded
* bomb gets passed automatically if the player holding the bomb disconnects
* various bug fixes
* spacebar passes the bomb
Merge branch 'master' of https://github.com/faBimon/ZackZackBoom

Conflicts:
	public/javascript/client.js