Flatpak version of RemoteMaster now available

[lbschenkel]

Hi, I've made a Flatpak package of RemoteMaster:
https://github.com/lbschenkel/remotemaster-flatpak

I think it might be useful to some Linux users around here. The advantage of a Flatpak is that it is entirely self-contained and it works out-of-the-box, you don't need to worry about installing Java and which version. I have packaged Java 8 runtime for maximum compatibility.

If you encounter any issues, feedback is more than welcome.