CECS 455 Project 3 Due Th 3-25
Druid -- Playing the Game

Start play with the Green player and alternate between Green and Blue. Only 
allow legal moves. A Sarsen may be placed directly on the board surface, or on 
top of any same colored stone. A Lintel may not be placed on the board surface,
but must be elevated by stones at both ends so that it lies flat and sits 
directly upon exactly two units of the same-colored stone. (It may bridge a gap
or sit on exactly one unit of enemy stone.

Determine when the game is won.