Added turn-taking requirement

Players are given bool "yourTurn" which is initiated as true for player
1.
On each play received, yourTurn is toggled.
Player can only send play request is yourTurn is true for them.
Added game status check on play, + win condition

Each time a play is received, the checkGameStatus function is called.
For tic-tac-toe this means checking if a line of 3 is made, and if so
then setting gameOver to true.
When gameOver is true, the board should not be interactive.
Fixed win conditions & added some debug options