anchor.diff:    + per_page (optional, integer) ... number of items to include on a
       page default is 20
     + sort (optional, string) ... field to sort by 'random' has special behaviour
  -  + workflow_id (options, intger) ... filter to subjects belonging to
  +  + workflow_id (optional, intger) ... filter to subjects belonging to
       a specific workflow. Required when sort is 'random'
  -  + subject_set_id (options, intger) ... return subjects belonging to
  +  + subject_set_id (optional, intger) ... return subjects belonging to
       the identified subject_set
   
   + Response 200
  
positive.code: 
      [Project][]
  
  ## Project Destroy Links [/project/{id}/links/{link_type}/{link_ids]
  An alternative way to destroy project links.
  
  ### Destroy a Link [DELETE]
  
negative.code:             }
          }
  
  + Response 201
  
      [Collection][]
  