Modified classes to implement ai. Simple ai is already implmented.
Tracing functions now work properly. Simple AI implmentend.
Added support for themes which are still being implemented. Added new constructor to class Stone. Rearranged GUI. The field of the game is now being shown inside the main application and no longer as a seperate widget.
Adapted Gui layout.
Modified gui to have focus after clicking on Start Game and widget of the game scene is now being placed better. ISSUE: The displayed field doesnt really match into the gui but is rather displayed too small.
Changed layout behaviour in gui.
Merge branch 'xperimental'