Details for Ubuntu 20.04

[kaapstorm]

Hi there @htrefil

I installed rkvm on Ubuntu 20.04 and Pop!_OS 20.04 (which is an Ubuntu derivative). This pull request is based on the lessons I learned. I hope it can help others.

You will notice that I dropped the minimum required version of libevdev from 1.9.1 to 1.9.0. This is to support Ubuntu 20.04's packaged version. I hope going back one patch version would be OK. (It works for me, fwiw.)

I made some assumptions along the way. If any of those assumptions are wrong, you should find them in the last commit. You could drop that commit, or correct any mistakes I might have made. (And I would also love to know what those mistakes are, so I can correct my installation.)

And lastly, thank you so much for rkvm!

I run Wayland on the server, and X on the client, and Synergy/Barrier works OK (if I put a window against the side of the screen on the server). But task switching, and additional features of my keyboard do not work, which negatively impacts my productivity. rkvm works like a charm! I really like the approach you took.

[marcelbuesing]

I think this a great addition to the readme. Definitely would save time during the setup. Also ran into the libdevdev version issue.