This gets rid of the hack for <https://github.com/cockpit-project/cockpit/issues/14133>.
There has been a lot of improvements since 213 and also due to new privilege escalation this is need. Closes #317
Rename some files and change some identifiers to be neutral to the application name. This makes it simpler to change everything to a proper name when cloning this project. Document in the README how to find the remaining places to change. Closes #20
Closes #16
