ListOfNodes: Removed setFirst and getLast, added isEmpty and clear, minor fixes.
ListOfNodesIterator: minor fixes.
MyReversiPLayer: No more progessive expanding of tree, now tree is expanded to the level when is signaled then it is recursive calculated best move with minimax algorithm
ListOfNodes: backed up setFirst()
Node: Added move field, added clearChildren()
MyReversiPlayer: added cutting the expanded tree, when taking decisions