Supports Checkers v1 (and v2) at Tiltyard.
Checks game type.
Adds GameInfo.java.
Adds StateMachineInfo.java.
Uses GameInfo and StateMachineInfo from GamerBase, and imporves Checkers' score function.
Moves "Checkers" detection to GameInfo.
Passes StateMachineInfo and GameInfo from gamer to planner.