Publish rolled player numbers to spectators.
Add documentation in SpectatorHandler.
Merge pull request #29 from tgoossens/spectator-playernumbers

Spectators need to know player numbers before the game is started.
Call handler methods from separate threads.
Merge pull request #31 from tgoossens/threaded-handler

Call handler methods outside of consumer threads.
Publish win signal to all GameHandlers.
Do not send another stop message on game won.
Do not stop the spectator on game won.
Merge remote-tracking branch 'upstream/master'