Highlight use of permissions alnog with authentication
Add `Unauthenticated` exception.
Add docs for 401 vs 403 responses
Use correct status code
Use correct status code
Use two seperate exceptions - `AuthenticationFailed`, and `NotAuthenticated`

Cleaner seperation of exception and resulting HTTP response.
Should result in more obvious error messages.
Merge with master
Remove OAuth2 from docs
Implementing 401 vs 403 responses
Merged to latest master
Drop unneeded test
Tweak imports in tutorial.  Fixes #597.
Raise assertion errors if @api_view decorator is applied incorrectly. Fixes #596.
`format_suffix_patterns` now support `include`-style nested URL patterns. Fixes #593
Update release notes
Drop print statement
Include kwargs in included URLs
Fixed reference to authtoken in the docs
Merge pull request #600 from brutasse/fix/authtoken-docs

Fixed reference to authtoken in the docs
Added @brutasse for docs fix #600. Thanks!