Delay solving animation

* Add a setTimeout for playing the nextRound of the game
  * Allows for the game to be solved in steps.
  * A large number of cells can be solved in one round though, which
    makes the animation look silly

Next step:
* Want to add a cool animation for when the cell is solved, instead
  of merely adding a color change
Create a game controller to play the game
Merge pull request #9 from mknudsen01/update-specific-cells

Update specific cells