Interface for clients defined
Some changes in Head

noMore()
newGame()
WiP
Synchronized stuff
Merge branch 'dev-thingol'

* dev-thingol:
  Checkpoint
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  Checkpoint Head
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  Checkpoint Head
  Synchronized stuff
  Interface for clients defined
  Client: getting very close to a usable main loop
  Checkpoint
  Client rewrite and test tools
  fixed logical error in GameServer
  Checkpoint

Conflicts:
	src/de/uni_jena/min/in0043/nine_mens_morris/core/GameClient.java
	src/de/uni_jena/min/in0043/nine_mens_morris/gui/Head.java
changed logging from trace to debug
added exit and entry log statements to just about all methods
fixed small error in windowClosing handler
added more debug logging statements
Checkpoint