start games with player ids

Fixes #1.

lobby/lobby.go

@@ -30,16 +30,6 @@ func (l *Lobby) Game(id GameID) *game.Game {
 	return l.games[id]
 }
 
-// Start starts a new game in the lobby.
-func (l *Lobby) Start() GameID {
-	id := uuid.New()
-	g := game.New()
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	l.games[id] = g
-	return id
-}
-
 // Finish removes a game from the lobby.
 func (l *Lobby) Finish(id GameID) {
 	l.mu.Lock()