This commit also adds tests for the redirect feature of most auth views.
It also cleans up the tests, most notably using @override_settings instead
of ad-hoc setUp/tearDown methods.

Thanks to caumons for the report.

Conflicts:
	docs/releases/1.6.txt

Fixes #18896. Add tests verifying that you can get IntegrityErrors using get_or_create through relations like M2M, and it also adds a note into the documentation warning about it

Add missing imports and models to the examples in internationalization and localization documentation

Note the don't require sessions to be in installed apps.

Addition and fix for custom user model example documentation.

https://code.djangoproject.com/ticket/20233

Thanks zalew for the suggestion and work on a patch.

Also updated, tweaked and fixed testing documentation.

Thanks wim@ for the suggestion and Nicolas Noé for the patch.

Thanks bmispelon for the suggestion and djangsters for the patch.

Allows for any iterable, not just lists or tuples, to be used as
the inner item for a list of choices in a model.

Also, streamline the use of 0 and None between cache backends.

Thanks Stephane Benchimol for the report and the initial script and
mfandreas for the patch.

References #16829.

It can fail in hard-to-diagnose ways.

Thanks marktranchant, bmispelon, and alextreme.

This completes the removal of the distinction between core devs and
specialists.

Patch by Simon Meers.

Thanks to Joel Hansson for the suggestion and Curtis Maloney for the initial
patch.

Largely inspired from django-floppyforms. Designed to not depend
on OpenLayers at code level.

The distinction's not really one we make any more, so updated the docs
accordingly.