GameController, clicking changes

- made it so that clicking on a tank makes it selected to move. Clicking
on a square to move it to or clicking on it a second time deselects it
for movement. Basically removed the timer to allow time to think.
- Added gamecontroller to keep track of turns.
- added a unitStatScript that would be applied to any unit and stores
defense, attack, player owner, and how many spaces it can move (if we
decide to do that that way)