anchor.diff:  
   Return an event and all its descendants.
   
  +### Show [GET]
  +
  ++ Response 200 (application/json)
  +
  +    + Attributes
  +        - events (array[event])
   
   
   # Data Structures
  
positive.code: - id: *h9iAjB* (string) - area guid
  - position (position) - in the containing Area
  - size (size) - in the containing Area
  
  # house_single
  - area
  
negative.code:         - (object)
              - id: *wedding* (string, required) - event guid
              - name: *Bob & Alice Get Hitched*
              - starts_at: *`2015-11-21@17:54`* (string) - commencement time
              - ends_at: *`2015-11-21@17:54`* (string) - termination time
  
  ### Show [GET]
  
  