Upgrade Tcl to 8.6.16
Use versioning to include tag, indication of timestamp and git hash.
Rename to include '7' in the labeling (as it is EL7 based)
Improve log output to keep information about versions used.
Update README.md a little.
(Take two)
+ Adds a GitHub Actions flow that builds an AppImage (see AppImages.org) that can produce a monolithic magic binary
~ Fix a portability issue in tcltk/magic.sh.in
This binary should theoretically work on any Linux distro with Glibc 2.3+ and Cairo 1.8+, which is any up to date distro in the last decade.
Darryl L. Miles
Donn
Tim Edwards