Add documentation to the get_queryset() method of generic-views.md regarding
the caching of the queryset property.

to the `queryset` property, `get_queryset()`, and do generic-views.md; remove
changes to the viewsets.md documentation from my last commit.

that they should use the get_queryset() method when overriding a
ModelViewSet method, such as list(). Otherwise, since queryset is
a static property, the value will be cached for every instance of
that ViewSet.

Typo fix.

Fixes #1535 (HTML widget missing `id` attribute)

Updated failing test from #1575

Add colon to time zone offset in readable_datetime_formats

Help docs

Use help_text, verbose_name, editable attributes for related fields 

Mark strings in AuthTokenSerializer as translatable 

Help docs

remove spaces from META['HTTP_X_FORWARDED_FOR'] as throttle key

Turning off pagination

Conflicts:
	rest_framework/tests/models.py

typo

Add help_text and verbose_name attribute mapping for related field

very minor typo in code example