//Makes the Pawn into a queen if it has reached the end of the board
public override void afterMoveAction(GameBoard board)
{
Location forwardLoc = location.Shift(0, getYForward());
if (!board.locationOnBoard(forwardLoc))
{
//Perform the queen me
Queen upgrade = new Queen(this);
board.removePiece(this);
board.addPiece(upgrade);
}
}
