a9858101bc
keybinder-3.0 is for GTK+ 3, whereas keybinder (already in nixpkgs) is for GTK+ 2. This adds version 0.3.0 of keybinder-3.0, which we named "keybinder3" in nixpkgs to (hopefully) lessen the confusion about what is package name and what is version number. [Bjørn: extend commit message beyond summary line]