add check that forces player 1 to only play when current player is X.  Forces player 2 to only play when current player is O
add check that forces player 1 to only play when current player is X.  Forces player 2 to only play when current player is O

LucasMcL/tic-tac-toe-realtime,LucasMcL/tic-tac-toe-realtime