Kuyruk

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Released on 15-09-2013.

- Fix the bug about freezing processes on exit.

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Released on 12-09-2013.

- Fix unclosed socket error on manager.

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Released on 30-08-2013.

- Removed InvalidCall exception type. TypeError or AttributeError is raised
instead.
- If a kuyruk process exits with a signal, the exit code will be 0.

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Released on 27-08-2013.

- Master uses os.wait() instead of polling workers every second.

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Released on 25-08-2013.

- Use forking again instead Popen after fixing import issue.
- Add "Quit Task" button to Manager interface.

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Released on 17-08-2013.

- Drop support for Python 2.6.
- Switch back to subprocess module from forking.