Hotqueue

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- Added ``key_for_name`` function

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- ``HotQueue.worker`` decorator method can now be used without any keyword arguments

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- Renamed ``HotQueue.dequeue`` method to ``get``
- Renamed ``HotQueue.enqueue`` method to ``put``
- Added ``HotQueue.worker`` decorator method
- ``HotQueue.get`` method now supports block and timeout arguments
- Added test suite

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- Initial release