#3 Allow plug in of gnuchess for a computer opponent and hints.

[Matthew Smalley]

Might require a bit of research, but since the game
engine now uses algebraic chess notation for the moves
/ positions, we should be able to tie it into PGN and
then plug in gnuchess as a computer opponent. Once this
is done, asking gnuchess for a player's move and
displaying to the player would allow a "hint" system.