Integrate Socket.io to allow for multiplayer games

[andrewjmeier]

• integrate Socket.io and post messages when a move is made
• Add toJSON and fromJSON methods to classes to allow the game state to be sent via socket
• update all of the other players' games with the new data from Socket after a move
• Create our own unique Start/Join game screens
• Figure out needed steps to host the game on Heroku or something

[andrewjmeier]

Current state is that I'm having trouble w/ the data being sent to all the other players of the games.