Uuid fix

Player change stuff has been merged in.

It's been disabled for now though. The code is still there, it just never gets called.

I also added a new listener for 'game:start', which we'll fire when we have 2 players.

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Going forward, we'll need to move this.initBoard() into startGameInstance() in main.js. We'll also need to add the joining Player to the Players collection. Once the collection has 2 players, we'll fire 'game:start'. Hopefully that makes sense.