* Identify code that needs to be pulled out of/removed from compat.py
* Extract modern code from get_names_and_managers in compat.py and remove compat code
* Extract modern code from is_authenticated() in compat.py and remove.
* Extract modern code from is_anonymous() in compat.py and remove
* Extract modern code from get_related_model() from compat.py and remove
* Extract modern code from value_from_object() in compat.py and remove
* Update postgres compat
JSONField now always available.
* Remove DecimalValidator compat
* Remove get_remote_field compat
* Remove template_render compat
Plus isort.
* Remove set_many compat
* Remove include compat
* Added TEMPLATES setting to tests
* Remove deprecated view-string in URL conf
* Replace 'urls = ...' in test classes with override_settings('ROOT_URLCONF=...')
* Refactor UsingURLPatterns to use override_settings(ROOT_URLCONF=...) style
* Get model managers and names in a version-compatible manner.
* Apply override_settings to a TestCase, not a mixin class
* Use '.callback' property instead of private attributes when inspecting urlpatterns
* Pass 'user' to template explicitly
* Correct sorting of import statements.
* Remove unused TEMPLATE_LOADERS setting, in favor of TEMPLATES.
* Remove code style issue
* BaseFilter test requires a concrete model
* Resolve tox.ini issues
* Resolve isort differences between local and tox environments
* Get rid of runtests.py
* Moved test code from rest_framework/tests and rest_framework/runtests to tests
* Invoke py.test from setup.py
* Invoke py.test from Travis
* Invoke py.test from tox
* Changed setUpClass to be just plain setUp in test_permissions.py
* Updated contribution guideline to show how to invoke py.test