Matchmaking should be done through the game manager instead of through the player

[richard-webb-dev]

currently too much reliance on find_game and leave_game Player() methods

[richard-webb-dev]

Moved into the Router, which is slightly better. But the router should be kept free of logic and should really just be a wrapper for the different operations.

The ultimate target remains GameManager, along with a matchmaking function

[richard-webb-dev]

2.5 hours