Pyinels

DevOps integration
* Continuous integration pipeline
* when new pull request then start build the project with tox unit testing and flake8 code linting
* create automatic distributing files sdist and wheel
* Continuos delivery pipeline
* automatic delivery package to the azure artifacts [DevOps PyInels Artifact repo](https://dev.azure.com/JH-Soft-Technology/pyinels/_packaging?_a=package&feed=pyinels_feed&package=pyinels&version=0.3.8&protocolType=PyPI)
* automatic delivery to [PyPi.org PyInels repo](https://pypi.org/project/pyinels)

Some DevOps testing with continuous integration and continuous delivery

Integrating DevOps

Extend Device.observe funciton with callback for succes and error state
- can set up callback with succes and error methods
- increase version from 0.3.0 to 0.3.1
- tests
- rearange some tests from main api to device tests

Breaking changes
- change class structure

- upgrade observer. When proxy not available then set device valu to None. So this have a reaction to the is_available property and then pass this information to the HA
- tests