initial implementation of new game connections
wip on new game start
Merge branch 'master' of https://github.com/asavonic/DotsBoxes

Conflicts:
	src/dotsboxes/SessionManager.java
Merge branch 'master' of https://github.com/asavonic/DotsBoxes

Conflicts:
	src/dotsboxes/SessionManager.java
reworked new game handshake between remote players
Merge branch 'master' of https://github.com/asavonic/DotsBoxes

Conflicts:
	src/dotsboxes/SessionManager.java
	src/dotsboxes/game/NewGameDesc.java
	src/dotsboxes/gui/GUI.java