This test was incorrectly checking that there were no validators set in
older versions of Django, even though it should have been checking for
the two validators that were set up on the model field level.

The originally regression test that this fixes was added in
https://github.com/tomchristie/django-rest-framework/commit/7d79cf35b7be01b175d8c25276a4414e8144a16b
when fixing an issue with the `DecimalValidator`.

Previously, all validators set on a DecimalField in Django would be
stripped when converted to a Django REST framework field. This was
because any validator that was an instance of `DecimalValidator` would
be removed, and when `DecimalValidator` wasn't supported (so it was
`None`), all validators would be removed.

This fixes the issue by only removing the `DecimalValidator` instances
if the `DecimalValidator` is supported.

This adds tests for a regression where the `min_value` and `max_value`
arguments are not being set for a DRF `DecimalField` even though the
corresponding `MinValueValidator` and `MaxValueValidator` is being set
on the model fields.

Note that this only appears to be a regression for Django < 1.9, as
these regression tests pass on newer versions of Django.

Fixes #3756, adding the name to the HTML title, if it exists.

Update the Django-guardian version for Django 1.9

Add DRF docs to "Documenting your API"

Update bootstrap version in browsable-api.md

Issue 3726 DateTimeField not handling empty values

Raise error when setting a removed rest_framework setting for #3644

Subclass AutoFilterSet from self.default_filter_set

docstring typo fix: DateAndFiles -> DataAndFiles

Move urls.py changes down and add necessary import

Fix tox build against python 3.5 by upgrading pytest.

The previous location of editting urls.py did not allow migrations to be created and the default import needs to be modified

Some minor typos and grammar changes.

Fix transifex config for Django

Version 3.3.2