Tweaks and fixes in order to support the pastebin tutorial

Drop resources from codebase since implementation is only partial (Created resoorces-routers branch for future reference)

Merge branch 'restframework2' of https://github.com/tomchristie/django-rest-framework into restframework2

Rename generic base classes, and add CreateAPIView, DeleteAPIView, UpdateAPIView.

* restframework2:
  Fix ModelSerializer logic for fields with default value, which should have required=False set
  Added @diviei - Thanks!
  Fix typo reported by @diviei

Implement per-field validation on Serializers

#314 Fix for manytomany field being required in the payload even though ...

#314 Fix for manytomany field being required in the payload even though the field is specified as readonly in the serializer

WIP on #310

Fix typo.

Conflicts:
	rest_framework/renderers.py - manually resolved conflict

Fix serialization of reverse relationships