render() must be called with a dict, not a RequestContext (RemovedInDjango110Warning)

Got the following warning on Django 1.9b1 whilst testing out the [Rendering HTML](http://www.django-rest-framework.org/topics/html-and-forms/#rendering-html) example.

```
.../python3.4/site-packages/rest_framework/renderers.py:171: RemovedInDjango110Warning: render() must be called with a dict, not a RequestContext.
  return template.render(context)
```
