Added OnMoveExecuted delegate to KaroGameManager.
Event is now properly fired in BoardComponent.
Improved thread in BoardComponent.
Merge branch 'master' into cellcolor_39

Conflicts:
	KaroManager/KaroGameManager.cs
Fixed yellow piece position.
CellSourceState properly changes to PieceSourceState after move execution.
CellSourceState now sets the CurrentMove to null after move execution.
Yellow cells are now at the correct position if the board moved.