Handle ObjectDoesNotExist exceptions when serializing null reverse one-to-one
Respect blank=True on relational fields. Fixes #537
Note paginate_by=None usage.  Fixes #555.
Clean up test slightly.  Refs #552
Create separate *NullableOneToOneTests TestCase
Fix reference to BasicAuthentication in settings.
Merge pull request #565 from mjtamlyn/patch-1

Fix reference to BasicAuthentication in settings.
ObtainAuthToken pluggable Serializer.

It should have serializer_class in the same way as any other API view.
Fix inconsistent view_name logic.  Fixes #567.
Merge branch 'master' of https://github.com/tomchristie/django-rest-framework
Merge pull request #566 from mjtamlyn/patch-1

ObtainAuthToken pluggable Serializer.
Merge remote-tracking branch 'upstream/master' into null-one-to-one
Update release notes
Merge pull request #553 from maspwr/null-one-to-one

Handle ObjectDoesNotExist exceptions when serializing null reverse one-to-one
Include CSRF note in SessionAuthentication docs.
unused imports
Merge pull request #572 from juanriaza/master

Unused imports
Imply an additional element in infinite lists

This is to allow the addition of elements without
having to change existing lines of code
Some comment on the tutorial repository
Bringing up the Web API