refactored joinGame function
pull joinGame into its own function and provide a route for joining a game with no game id
remove unnecessary variable from Hole.prototype.findMatchableHoles and change announcement to message
add minified connect four board js
start first turn from server rather than client
send board along with turn at the start of each turn
only emit board to robots when it's their turn
let socket know whether or not it won
fix syntax error in hole.prototype.findMatchableHoles
remove logger in join-games.js
send the robots a plain 2d array of the board