Created an enum for representing different vote types.
The JsonRequestHandler works as an instance, maintaining the root URL for the planning poker game.
Added a Vote method to the Game class.
Requests urls in Game are build using the string.Format method.
Added a Parse method in the vote type extension.
Votes can be retrieved and cleared. Using the latter and the Description property, the game can be reset using the ResetGame method.
Changed description.set request type to Post.
Added a ToString method in User.
Votes retrieved from server can be null.
Votes are cached in Game after running UpdateVotes.