Fix *Throttle class names in the docs

* AnonThrottle -> AnonRateThrottle
* UserThrottle -> UserRateThrottle
* ScopedThrottle -> ScopedRateThrottle
* (cosmetic) removed one errant whitespace character

Fixes #1006.
Merge pull request #1007 from willkg/throttle-docs-fix-1006

Fix *Throttle class names in the docs
Add @willkg for #1007 thanks!
Fixed reversed arguments in assertion
Added to the credits
Merge pull request #1010 from kevin-brown/issue_1008

Fixed arguments in assertion
Fix Tutorial5 serializers.py typo

[Issue #N/A]

A slight typo at Tutorial5 causing an Exception "name 'models' is
not defined". A subtle one that can confuse Python/Django noobs
like me.
Merge pull request #1011 from coderigo/docs

Fix Tutorial5 serializers.py typo
Add @coderigo for #1011 thanks!
Docs about migrations and `post_save`.

Documentation detailing requirement to migrate prior to running `createsuperuser` if using an authtoken `post_save` signal.
Closes #987.  Thanks to @yprez.
Merge branch 'master' of https://github.com/tomchristie/django-rest-framework
Notes on customizing BrowsableAPIRenderer.  Refs #1001
Updated authtoken docs to mention south migrations
Minor typo fix
Merge pull request #1013 from Maplecroft/doc_fixes

Clarification to authtoken docs
Add @jimr for #1013 thanks!
Merge remote-tracking branch 'upstream/master' into writable-nested-modelserializer