Installer list as radio buttons instead of drop-down menu

It's more practical to see them all at once.
If we ever get a case where the list is too long for the window, we'll
have to wrap them in a scroll box.
Last minute bug

I love it when I make a last minute change and don't test it as I'm
certain it's safe... and it's not.
Add RPM build spec file
[List view] Update runner column when game (un)installed
Real README
Add changelog for 0.3.5
Update Standards-Version
Update path for new lutris.net server
Update host for new lutris.net server
Fucking git