coleifer/huey 2.2.0 on GitHub

Fix task repr (refs #460).
Adds task-id into metadata for task exceptions (refs #461).
Ensure database connection is not closed when using the call_local method of Django helper extension db_periodic_task().
Allow pickle protocol to be explicitly configured in serializer parameters.
Adds FileHuey and full FileStorage implementation.
Add shutdown() hook, which will be run in the context of the worker threads/processes during shutdown. This hook can be used to clean-up shared or global resources, for example.
Allow pipelines to be chained together. Additionally, support chaining task instances.