I broke down and did it. The Linkage program source code can be found here:
I have no idea if I set up GIT properly locally or remotely. Only time will tell. I suspect that I’ll make some changes that will end up going directly to the server or will be lost completely.
Anyhow, if anyone has experience with GitHub and using GIT properly, not just getting a zip file of the sources, feel free to give me advice about it.