Clean up
Update release notes
Update 1-serialization.md

Fixed typo in documentation (Testarea to Textarea)
Merge pull request #938 from bigsassy/master

Fixed minor typo in tutorial documentation.
Add Django OAuth Toolkit to docs
Merge branch 'master' of https://github.com/tomchristie/django-rest-framework
HyperlinkedModelSerializer supports overriding of 'url' field. Closes #936
Remove erronous checkin