anchor.diff:      }
   
   + Response 200 (application/json)
  -Once both players have chosen a card value, the server will resolve the round and update each player's hand
  +Once both players have chosen a card value, the server resolves the showdown and updates each player's hand
   
   + Response 401 
   player_id was invalid for the provided game_
   
   + Response 403 
  -player_id did not have the selected card+player_id does not have the selected card
positive.code: player_id was invalid for the provided game_
  
  ### Play a Card [POST]
  Choose a card value to play. 
  Until your opponent chooses their card for this round, you may update your choice
  
  Playing the Ace of Spades lets you discard any card while *also* discarding your opponent's card
  
  + Parameters
      + game_id (required, number) - unique ID for the game
  
negative.code:     { 
          "game_id": '42',
          "player_id" : '31337',
           "hand" : {
              "player_id" : '31337' 
              "cards": [ {value: '2', suit:'diamonds'}]
              }
  
  ## Playing the Game [/play]
  
  