Hirefire

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- Added Flask blueprint.
- Fixed Celery queue length measurement for AMQP backends.

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- Fixed a regression in 0.2.1 fix. Thanks to Ryan West.

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- Fix the RQ_ Proc implementation to take the number of task into account
that are currently being processed by the workers to prevent accidental
shutdown mid-processing. Thanks to Jason Lantz for the report and
initial patch.

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- Got rid of d2to1 dependency.
- Added django-pq backend.
- Ported to Python 3.
- Added Tornado contrib handlers.

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- Initial release with backends:

* Celery_
* HotQueue_
* Huey_
* Queues_
* RQ_

.. _Heroku: http://www.heroku.com/
.. _Celery: http://celeryproject.com/
.. _HotQueue: http://richardhenry.github.com/hotqueue/
.. _Huey: https://huey.readthedocs.io/
.. _Queues: http://queues.googlecode.com/
.. _RQ: http://python-rq.org/