Fixed parsing message Test. Closes #26
Renamed test class
Server now initializes one AI that wants to play, for easier testing
Exit command to shut down the server (the hard way)
Fixed strength and health of a creature. 3/2 ---> 2/1
Fixed attack system so creatures either die or don't take damage at all
Merge branch 'gameplay-fix' of github.com:Cardshifter/Cardshifter into javafx