Game creation overload

[AChelikani]

In create_game in app.py, a new game object is created and stored every time the create button is clicked. Even if no players end up joining the lobby or the game is never actually started, the game is created, stored, and remains forever. Some mechanism for deleting game should be put in place.

[TheOrangeOne]

My thinking for this was to not create the game until the user has actually entered the lobby.

Also we should delete games after X mins of no user being in the game.