Blebox-uniapi

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* never skip command requests
* improve error messages

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* expose device info
* always add ip/port in connection errors
* fixed gateController support
* support for sauna min/max temp

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* fix switchBox support
* fix minimum position handling
* drop Python 3.6 support (still may work)
* misc fixes, cleanup and increased test coverage

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* Fixed wLightBox issues
* Fixed wLightBoxS issues
* Fixed shutterBox issues
* Handle unknown shutterBox position
* Improved error handling + lots of new diagnostics
* Increased tests and test coverage (almost 100%)
* Lots of rework

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* Fixed switchBox support (newer API versions)

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* First release on PyPI.