Fixed typos/wording in Changelog

Bumped version to 2.0.3 and updated Changelog

Changelog: Fixed rst indentation issue

Fixed typos in Changelog

Removes django-picklefield from contrib/requirements/default.txt

Forgot to render README

Added internal reference autodoc for celery.backends.cache

Bumped version to 1.0.6 and updated changelog

Bumped version to v1.1.2

Bumped version to 1.1.1