anchor.diff:              {
                   "id": 2
                   "url": "http://www.domain.name/resource_normalized_by_server_2.html",
  +                "title": "Title 1",
  +                "image": "http://url/to_image.jpg",
                   "created_at": "2015-08-05 08:40:51+01:00",
                   "updated_at": "2015-08-06 08:40:51+01:00",
                   "tags": [
  
positive.code:                     "vacation"
                  ]
              }
          
  ## Get, Update or Delete existing items [/items/{item_id}]
  
  + Parameters
      + item_id: 1 (number) - ID of the item that you need to update
      
  ### Get an item by ID [GET]
  
  
negative.code: + Response 409 (application/json)
  
              {
                  "message": "Email address already exists."
              }
          
  ## Authentication [/authenticate]
  