Places: HAL representation / domain object: multiple parents
Simplified code
Merge branch 'master' into places-multiple-parents

* master: (296 commits)
  OxPoints / fix bug introduced in 46bd4e8 when adding multiple types
  OxPoints importer / add type of the merged Thing
  OxPoints / updated managed building property to use better representation
  OxPoints / added accessibility_has_accessible_parking_spaces
  Updated Places API documentation to include HAL representations
  OxPoints / added import of is_display_in_maps_department_list
  Updated documentation regarding accessibility parameters
  Fix 500 error when parameter q was absent in the suggest handler
  OxPoints importer / index oxp:managedBuilding #85
  Removed debug comment
  Make sure that a Building would not get the shape of a Site
  Updated primary_place to align to merged site
  Added documentation for the new rel
  Added primary_place attribute
  Added some documentation
  Added method to find shape of a Thing
  Updated unit tests class name
  Simplify method
  Fix bug in ordering -- prefer "physical" relations rather than org
  Use new helper in oxpoints importer
  ...

Conflicts:
	moxie/places/representations.py
Merge pull request #51 from ox-it/places-multiple-parents

Places HAL representation: multiple parents