Initial packaging (Closes: #1108770)

Closes: http://bugs.debian.org/1108770

This is a Merge Request targeting the branch debian/sid, which equals the contents of upstream commit 4678299b from 20191108. It will get a debian/ subdirectory only starting from this MR being merged.

This MR will be updated/rebased until it is ready for upload.

Please share all the feedback you have. You don't need to be an expert in the domain - any feedback is valued. Also comments stating that you checked this out but didn't spot any issues are also valued, as it counts to the number of eyeballs that saw this before upload.