Htrest

* Adapted logging statements and default log levels.
* Python code reformatting using *Black*.
* Added possibility so that boolean values can be treated as integers (arg `--bool-as-int`).
* Fixed unsynchronized access to `HtHeatpump`, which results in a serial communication error.
* Changed package requirements structure; some changes in `setup.py`, `setup.cfg`, `tox.ini`, etc.

* Fixed wrong uploaded package on PyPi.

* Fixed missing file `logging.conf`.
* Corrected usage of host and port for the web server.

* Fixed wrong version definition.

* Fixed some errors in the project packaging.

* First release on PyPI.