- Update to 3.0.10:
  - Now depends on kombu 2.4.7
  - Now depends on billiard 2.7.3.14
    - Fixes crash at startup when using Django and pre-1.4 projects
      (setup_environ).
    - Hard time limits now sends the KILL signal shortly after TERM,
      to terminate processes that have signal handlers blocked by C extensions.
    - Billiard now installs even if the C extension cannot be built.
        It's still recommended to build the C extension if you are using
        a transport other than rabbitmq/redis (or use forced execv for some
        other reason).
    - Pool now sets a ``current_process().index`` attribute that can be used to create
      as many log files as there are processes in the pool.
  - Canvas: chord/group/chain no longer modifies the state when called
    Previously calling a chord/group/chain would modify the ids of subtasks
    so that:
        >>> c = chord([add.s(2, 2), add.s(4, 4)], xsum.s())
        >>> c()
        >>> c() <-- call again
    at the second time the ids for the tasks would be the same as in the
    previous invocation.  This is now fixed, so that calling a subtask
    won't mutate any options.
  - Canvas: Chaining a chord to another task now works (Issue #965).
  - Worker: Fixed a bug where the request stack could be corrupted if
    relative imports are used.
    Problem usually manifested itself as an exception while trying to
    send a failed task result (NoneType does not have id attribute).
    Fix contributed by Sam Cooke.
  - Tasks can now raise celery.exceptions.Ignore to skip updating states
    or events after return.

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