debug-me is released!

I made one last protocol compatibility breaking change before the release. Realized that while the websocket framing protocol has a version number, the higher-level protocol does not, which would made extending it very hard later. So, added in a protocol version number.

The release includes a tarball that should let debug-me run on most linux systems. I adapted the code from git-annex for completely linux distribution-independent packaging. That added 300 lines of code to debug-me's source tree, which is suboptimal. But all the options in the Linux app packaging space are suboptimal. Flatpak and snappy would both be ok -- if the other one didn't exist and they were were installed everywhere. Appimage needs the program to be built against an older version of libraries.