removed Piece class, now storing pieces as int[]s with 4 items
Merge branch 'master' into noPiece

Conflicts:
	classes/Human.java
	classes/Piece.java
	classes/Robot.java
	classes/Starter.java
Merge branch 'master' into noPiece

Conflicts:
	classes/Board.java
	classes/Piece.java
changed draw to after 8 moves instead of 12, added turn timers
multiple performance improvements
fixed simulate.sh to use nxj compiler