Adding a whole slew of things.
Firstly, added age, phase, round, and turn to Game
Added list of BuildingCards to Game
Added ability to Join a Game if it's not full or started
Added logic to set the Game up when enough people have Joined it (via
Update verb; not super keen on that, but whatever -- it can change later)
Updated BuildingCard seeds to handle 2-player Long and 3- & 4-player Short
variants.