enhancement #3886 Internationalization in admin interface for authtoken

+ verbose_name in models.Token fields
+ Meta-options verbose_name & verbose_name_plural
+ Labels in AuthTokenSerializer fields in case of usages in Brousable API
+ provide AppConfig class as described in django documentation with verbose_name came through ugettext_lazy

Fix syntax errors in docs example

- Add missing comma in kwargs
- Remove spaces around keyword / parameter equals
- Replace incorrect curly brace with parenthesis

Mention Live API Endpoints for DRF Docs

Refactor the `get_queryset` overriding test

Restore the abstract on Token model when the app isn't declared

The fact that we don't import Token from authentication doesn't invalidate
the need for the model to be abstract whenever the authtoken isn't listed
in the INSTALLED_APPS.

Fix broken link format

Login form autofocus

RelatedField get_queryset and context

Update link to Heroku guidelines

They seem to have changed the structure of the document.

Activate the Python 3.5 build.

Maintain py32 test builds

Add missing csrf_token in AdminRenderer post form.

Markdown compat (overtakes #3604)

Conflicts:
	requirements/requirements-optionals.txt

Fix update model example in html-and-forms.md

Added explicit id field in multi update example

Update license year range to 2016

Update permissions.md

Adding additional note about the behavior of set permission classes per view as suggest on #3834