Twisted-mqtt

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Backwards compatible with 0.2.1, with three enhancements:
- Persistent ***per-connection state*** (Pending Publish & Subscription ACKs). Verion 0.2.1 cannot be used with two simultaneous, different MQTT broker connections.
- Internal queue to hold PUBLISH requests beyond the window size.
- Adaptive timeouts depending on PUBLISH PDU size and a bandwith estimate. New protocol API function `setBandwith()`. This will avoid dupicate payloads using QoS 1 and 2.

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Major internal refactoring of the publish, subscribe and pubsubs roles over 0.1.6.

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Common 'mqtt' namespace for logging. This should help in log fltering.
logger module out fo the library. Logging fucntions now in the examples.
Changed subscribe() interface description

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Fixed missing README.md

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Initial release.