* Add notify.homematic_signalgen
* Update homematic_signalgen.py, test_homematic_signalgen.py
* Added new files to .coveragerc
* Fixed review comments from houndci-bot
* Fixed pylint errors
* Regenerate requirements_test_all.txt by script/gen_requirements_all.py
* Fix flake8 warnings
* Renamed notify.homematic_signalgen to notify.homematic and made it generic
* Update .coveragerc and requirements_test_all.txt
* Removed the terms signal generator from the sources.
