anchor.diff:  
   # Change log
   
  +## 14/04/2016 toja
  + - added parameter to show flashcards visibility
   ## 06/04/2016 toja
    - updated description of decks resources
    - fixes in response codes
  
positive.code: 
  Response with HTTP code different then **2xx** family should be treated as a failure response. 
  By default API return response with HTTP code **4xx** family.
  
  ### Example HTTP 400 Bad request response:
  ```
  {
      "code": "E001",
      "message": "Id cannot be null"
  }
  ```
  
  # Group Deck
  
  ## Decks [/decks]
  
negative.code: 
  + Response 200 (application/json)
      + Attributes (Deck)
  
  ### Get random Deck [GET /decks{?random}]
  
  + Parameters
  