Reorganization of repository
The scope of this repository has changed since @eric.spivey integrated his Librem 5 case design. Maybe we should reorganize it and make it more general:
- maybe rename the repo to something more general
- give the folder "/source" a proper name
- make the Readme more general and create a Readme for every model
- the license file should also be adjusted, because not everthing is licensed as CC BY-SA (also see #1 (closed))