- add a validation/logic to make_move method in game model for more than 6 mistakes.
- add a redirect rule when more than 6 mistakes made (make_move method in games_controller)
- add a validation not allowing selection of a letter that's already been selected
- add validation/login for winning the game when guessing the whole word
- add a redirect rule when word guessed
- change lobby controller so that it moves a game from playing to created when status 1 (won) or 2 (lost)