Add clarification of MIT license

Add README

Update defaultBoardSize to be 3 rather than 4

Remove Ruby stuff -- stack --file-watch has this functionality built in

Update Console.Driver to play basic game

Remove hardcoded reference to a 3x3 board

Update ContextSpec to use Token rather than String

Update type annotations

Add newToken convenience function

Prevent Token conflicts with Player's Token by renaming the Space field token -> spaceToken

Adds currentPlayer field to the GameContext

Minimax v2

Add displayBoard function to Console.Driver

Refactor opposite function

Add nextTurn field to GameContext