Fixes @list_route and @detail_route so that they don't initialize their `methods` parameter as a list. In some cases the list gets cleared, and the result is that default parameter is now empty, and may get reused unexpectedly.

Add django-rest-framework-recursive to docs

Small documentation fixes

* Remove "you you" from viewsets API-guide
* Fix link from routers API-guide to viewsets API-guide

Fixed missing whitespace in error string.

Fixed typos in docstrings

Update link for ember-django-adapter

Fix base_template examples 

_closable_objects as an empty list, not deleted

Cleanup '.model' shortcut from code and docs

Update filtering.md

Updated links for django-guardian package.

 ManyRelatedField.get_value clearing field on partial update

Use the proper db_table argument when constructing meta

Reload api_settings when using Django's 'override_settings'

Release notes for 3.0.4

A PATCH to a serializer's non-related CharField was clearing an ancillary StringRelatedField(many=True) field.
The issue appears to be in the ManyRelatedField's get_value method, which was returning a [] instead of empty
when the request data was a MultiDict.

This fix mirrors code in fields.py, class Field, get_value, Ln. 272, which explicitly returns empty on a partial update.

Tests added to demonstrate the issue.

typo in fields.md

minor typo in viewsets docs