Refactor into model, view controller pattern

[lyricluo]

Separate the game logic from display to make the project easier to test.

[Sierrasch]

Right now the game logic and the view are very tightly coupled. For example, on a move command, the player is just redrawn somewhere else. Refactor this so that the player state, etc... are stored as "game state" and drawing this consists of just rendering the board state

[Sierrasch]

W18 OK (350 pts)