This is gonna be awesome.
start a new game POST /game inits a game, others join by id
POST /game/{id}/player { email: "blah"} gets back token to participate in that game
GET /game/{id} "returns game state"
POST /game/{id}/word "round leader can set word for current round"
POST /game/{id}/submission uploads file to s3 and runs rekog on it, updates game object
POST /game/{id}/choice set winning submission