Rendered README.rst

Fixed link to HTTP callback tasks

Bumped version to 0.8.4 and updated Changelog

Bumped version to 0.9.7 / 1.0.0-pre3 and updated Changelog.

Bumped version to 0.9.7 / 1.0.0-pre3 and updated Changelog.

Bumped version to 0.9.6 and updated Changelog

Bumped version to 0.9.6 and updated Changelog

Fix outdated examples in cookbook/unit-testing. Thanks kmike. Closes c…

…elery#65

Version bumped to 0.9.4

Bumped version to 0.8.3 and updated the Changelog