====================
Enhancements:
+ Make MapperMixin.single_response and MapperMixin.multiple_response get
mapper, object, and queryset if none is provided.
+ Dropped testing support for older versions of Django
+ Added DataMapper tutorial to docs (Thanks limbera!)
+ Added ModelFilter to DataMapper
+ Reworked Publisher URLs to be easier to customise, and more consistent
+ Added test module
+ ModelDataMapper now creates a new Model instance if not passed one at
construction.
+ Pass list of excluded fields to Model.full_clean()