Debian and RPM packages for Linux

Debian packages have been added as well as RPM packages.
These were tested on the following platforms: Ubuntu 19.04 and Fedora 30 workstation (June 2019). They also work unpacked and manually installed under Gentoo amd64, same date.
As of July 1st 2019, a fully static linux build will be uploaded, which should run under all Intel and compatible AMD 64-bit platforms (look for package -linux-x86_64.tar.xz)
However menu editing will request libc dependencies (at least version 2.28) that might not be updated on user platforms. In this case, use platform binaries to replace those in subfolder bin/