anchor.diff:  # Headers
   Panotpes API sometime requires specific headers to be sent as part of requests.
   
  -All requests should set `Accept: application/vnd.api+json; version=1`. You will receive a `404 Not Found` without it. 
  -
  -All PUT and POST requests should set `Content-Type: application/vnd.api+json; version=1` or `Content-Type: application/json`. You will receive a `415 Unsupported Media Type` without one of those two headers. 
  -
  -All PUT and DELETE requests should set the `If-Unmodified-Since` header to the value of the `Last-Modified` header of the request where the resource was originally retrieved. You will receive a `428 Precondition Required` without the header and a `412 Precondition Failed` if the date is older than the last change to the resource. 
  +All requests should set `Accept: application/vnd.api+json; version=1`. You will receive a `404 Not Found` without it.
  +
  +All PUT and POST requests should set `Content-Type: application/vnd.api+json; version=1` or `Content-Type: application/json`. You will receive a `415 Unsupported Media Type` without one of those two headers.
  +
  +All PUT and DELETE requests should set the `If-Unmodified-Since` header to the value of the `Last-Modified` header of the request where the resource was originally retrieved. You will receive a `428 Precondition Required` without the header and a `412 Precondition Failed` if the date is older than the last change to the resource.
   
   # Group Panoptes API Root [/]
   Panoptes API entry point.
  
positive.code:                 "collection_preferences": [{
                      "id": "942",
                      "preferences": {
                          "display": "grid" 
                      },
                      "created_at": "2014-03-20T06:23:12Z",
                      "updated_at": "2014-04-21T08:22:22Z",
  
negative.code:                 },{
                      "id": "949",
                      "preferences": {
                          "display": "grid"
                      },
                      "created_at": "2014-08-20T06:23:12Z",
                      "updated_at": "2014-09-21T08:22:22Z",
  