updated versions for release 3.3.0

Bump version.

Bumps version to 3.2.1

version and doc changes (celery#500)

Bumps version to 3.1.17 and updates Changelog

Bumps version to 3.1.16 and updates Changelog

Adds djcelery.compat to reference

Bumps version to 3.1.10 and updates Changelog

Tests passing on Django 1.7a1

cannot use sphinx in readme