This reference in GameState can be removed once it is given to AIPlayer in game
initialisation (setupGameState)

This will be called from the Initialise class, making the game state ready to be
played- create player instances, board, tiles, cards etc

This avoid the ugly hack of keeping a referenec in GameState

Intention is the game hands control to AI player after human ends turn by
calling this method

TurnDemo class not really necessary but illustrative

There is a display bug on the frontend with this- it isn't quite aligned with
Player 2's RHS avatar

Can use this on AI turns etc to send messages back to frontend

Generated using
https://www.toptal.com/developers/gitignore/api/sbt,playframework

and also ignored the game sprites / other UI images