anchor.diff:  TODO
   
   ## User [/users/{userID}]
  +Public user profiles.  `gravatar_email` is only visible to the users themselves, not to other users.
  +The other information is public.
  +
  ++ Model
  +    + Header
  +
  +            Link: <https://catalog.elog.io/users/5396e592d7d163613d7321ee>;rel="self"
  +
  +    + Body
  +
  +            {
  +                "id": "5396e592d7d163613d7321ee",
  +                "uri": "https://catalog.elog.io/users/5396e592d7d163613d7321ee",
  +                "alias": "foobar",
  +                "profile": {
  +                    "name": "Foo Barson",
  +                    "email": "foo@example.org",
  +                    "location": null,
  +                    "website": "http://this/page",
  +                    "gravatar_email": "foo@example.org",
  +                    "gravatar_hash": "34cd643fb9230abe3",
  +                }
  +            }
  +
  +### Get User profile [GET]
  ++ Response 200 (application/json)
  +    [User][]
  +
  +
  +### Update User profile [PUT]
  +
  +`gravatar_hash` cannot be set directly, only via `gravatar_email`.  
  +Only the included properties are changed, as in `PATCH`.  
  +Set a property to `null` to remove the value.
  +
  ++ Request
  +    [User][]
  +
  ++ Response 200 (application/json)
  +    [User][]
  +
  +
  +### Update User profile [PATCH]
  +
  +See `PUT`.
  +
  ++ Request
  +    [User][]
  +
  ++ Response 200 (application/json)
  +    [User][]
  +
  +
  +## Organisation [/orgs/{orgID}]
   
   TODO
   
  -## Organisation [/orgs/{orgID}]
  +## Organisation collections [/orgs]
   
   TODO
   
  -## Organisation collections [/orgs]
  +## Group [/orgs/{orgID}/groups/{groupID}]
   
   TODO
   
  -## Group [/orgs/{orgID}/groups/{groupID}]
  -
  -TODO
  -
   ## Group collection [/orgs/{orgID}/groups]
   
   TODO
positive.code:                     "https://catalog.elog.io/groups/someGroupID"
                      ],
                  "annotations": [{
                          "id", "63613d7321ee5396e592d7d1",
                          "updated_by": "https://catalog.elog.io/users/anotherUserID",
                          "updated_at": "2014-04-14T02:15:15Z",
                          "score": 100,
  
negative.code:                 "added_at": "2014-04-14T02:15:15Z",
                  "replaces": "https://catalog.elog.io/media/prevMediaID",
                  "annotations": [{
                          "id": "63613d7321ee5396e592d7d1",
                          "updated_by": "https://catalog.elog.io/users/anotherUserID",
                          "updated_at": "2014-04-14T02:15:15Z",
                          "score": 100,
  