DateField to_representation can handle str and empty values. Fixes #2656, #2687.

Depth should reduce on nested ModelSerializer classes.

Merge pull request #2757 from ekiourk/2630/Raise-exception-when-ModelSerializer-used-with-abstract-model

Raise error when ModelSerializer used with abstract model

Update 5-relationships-and-hyperlinked-apis.md

Move ul.breadcrumb margin to bootstrap-tweaks.css

Check AcceptHeaderVersioning with content negotiation in place

Remove mention of Django's built-in ValidationError in docstring

The `exception_handler` does not actually handle django.core.exceptions.ValidationError, so remove any mention of it.

This closes #2872

Frontpage example no longer uses model attribute

Prevent empty `queryset`s to raise AssertionError.

Tell DjangoModelPermissions to rely on get_queryset first.

Update renderers.md

jsonp renderer not in the yaml package

Set IntegerField class variable for compiled decimal regex, comment for ...

Now it is possible to display viewset w/o paginator

Specifying module for CurrentUserDefault()

Prevents having to lookup the import

only allow integer field to accept integers and strings, fixes #2835

Following  [@jpadilla](https://github.com/jpadilla)'s suggestion in issue [#2837](https://github.com/tomchristie/django-rest-framework/issues/2837), I am proposing a little addition in "Creating an endpoint for the root of our API" section in order to make it clear that the `user-list` and `snippet-list` names will be declared later in `snippets/urls.py`. Missing this clarification might lead a beginner (like me) to think that the names are somehow assigned by rest_framework under the hood and to try the code too early, getting stuck in the following errors.

Match IntegerField validation with Django's, preventing decimal values being stored as ints, fixes #2835.

Match IntegerField validation with Django IntegerField, prevents decimal values being stored as ints, fixes #2835
 On branch master

Moved to color associated with the breadcrumb to the tweaks style sheet.

Don't check for deprecated '.model' attribute in permissions

docs/renderers: `StaticHTMLRenderer` instead of `TemplateHTMLRenderer`

The `StaticHTMLRenderer` section referred to `TemplateHTMLRenderer`
instead of `StaticHTMLRenderer`.

Django 1.8 is no longer in beta

Update example of nested data

When importing other bootstrap themes from sites like bootswatch, the
margin in default.css persists and adds a 70px margin below the header.
This change will remove that margin when users choose to use a different
bootstrap theme.