Django-celery-boost

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* add AsyncJobModel

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* rename `celery_result` as `local_status`
* add `datetime_queued`, `datetime_created`, `repeatable`, `owner`, `group_key`
* add signals
* add property verbose_status

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* fixes deps version

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* ModelAdmin changes

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* improve template customization

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* Add custom permissions
* Renamed some fields to avoid clashing
* add revoke() support