Game is playable!

 - Added ability to use helicopter lift card
 - Added game win condition

I was successfully able to play the game to completion with this code. Playing without player abilities makes the game very dificult though.

ToDo:
 - Allow playing of special cards when discard is forced
 - Only show one action in the list when a player can give 2 or more of the same treasure card
 - Add player special abilities