anchor.diff:  + Request (application/json)
   
               {
  -
  -            }
  -
  -+ Response 200 (application/json)
  -
  -            {
  -
  -            }
  +              "title": "Gandalf comes to see Bilbo",
  +              "subchapters": ["test", "titles", "go", "here"],
  +              "price_cents": 10000
  +            }
  +
  ++ Response 200 (application/json)
  +    + Attributes (Module)
   
   
   ## Group CCXs
  
positive.code: 
  + Response 204 (application/json)
  
  
  
  ### Partially update a Module [PATCH]
  
  + Request (application/json)
  
negative.code: Deletes the association of a module from a CCX course.
  
  + Response 204 (application/json)
  
  
  # Data Structures
  
  ## Course (object)
  + title: Introductory Physics: Classical Mechanics (string)
  + author: David E. Pritchard (string)
  + content_summary (object)
      + chapters: 14 (number)
      + exams: 3 (number)
      + resources: 4 (number)
  + video_url (string)
  + terms_url (string)
  + overview (string)
  + description: This is a college-level Introductory Netwonian Mechanics (string)
  + resources (object)
      + modules (string) - url to list modules
  
  ## Module (object)
  + title (string)
  + price_cents: 1000 (number) - price in cents to avoid poor decimal support
  + pages (array[string]) - list of strings representing chapter pages
  