0.9.0

• Removed ability to provide a sqlalchemy.orm.session.Session class
  when initializing APIManager; provide an instance of the class
  instead.
• Changes some dynamically loaded relationships used for testing and in
  examples to be many-to-one instead of the incorrect one-to-many. Versions of
  SQLAlchemy after 0.8.0b2 raise an exception when the latter is used.
• #105: added ability to set a list of related model instances on a model.
• #107: server responds with an error code when a PATCH or
  POST request specifies a field which does not exist on the
  model.
• #108: dynamically loaded relationships should now be rendered correctly by
  the views._to_dict function regardless of whether they are a list or
  a single object.
• #109: use sphinxcontrib-issuetracker to render links to GitHub issues in
  documentation.
• #110: enable results_per_page query parameter for clients, and added
  max_results_per_page keyword argument to APIManager.create_api.
• #114: fix bug where string representations of integers were converted to
  integers.
• #117: allow adding related instances on PATCH requests for
  one-to-one relationships.
• #123: PATCH requests to instances which do not exist result in
  a 404 response.