* reference/master: (22 commits)
  Clarify get_schema_fields signature
  Updated monthly report link on funding page
  Bumped django-guardian version.
  remove django 1.11 from allow_failure matrix
  update django 1.11 to stable release in tox
  Update existing vary headers in response instead of overwriting them.
  Update links after moving to encode org
  Use overridden settings exception handler
  Pass initkwargs stored on view to instance
  Update 7-schemas-and-client-libraries.md
  Update Boolean field to more closely match python library
  Fix parser names in docstring.
  Fix typo at docstring
  update test case
  update test case
  fix unique=True validation for ChoiceField
  Added drfpasswordless to Authentication docs
  Document adding django_filters to installed apps
  Added drfpasswordless to third party packages topic page.
  Added drfpasswordless to authentication topic page.
  ...