Update and improve the WinLibs download directory
This is URGENT because it ought to be done before we advertise https://computing.mlz-garching.de/download/WinLibs/ in our deployment paper.
- Upgrade all packages
- Each package needs a provenance and a license file
- All should have zip type and extension (currently, libboost is packed as 7z)
Note that unzip does not create package-specific subdirectories. It installs everything to top-level include/ and lib/. Provenance and license files should go to doc/. No file name must appear in more than one zip archive. Therefore we shall use file names like provenance-eigen.txt and license-fftw3.txt. Or propose a better solution.
To be considered later: To avoid future manual updates, reactivate and extend use of our https://jugit.fz-juelich.de/mlz/winbuild repository. Set up a .gitlab-ci.yml that downloads and rebuilds the zip archives once a week, and deploys them to locations on our CI machine where they are used by BornAgain and Steca CI.