Fix the warnings given by dotter for files that are not
utf-8 encoded to explicitly be identified as symlinks.
Should ultimately probably be either moved into data
directories or moved out of repo altogether, but for
now it works well.
Since we now use dotter we can simplify the dir structure for
qutebrowser a lot. Everything dot-filed earlier can now reside
in simple directories called config (for ~/.config/qutebrowser),
data (for ~/.local/share/qutebrowser), and scripts
(for ~/.local/bin) files.
Everything that is in the repo should be listed in the global.toml
file. The local.toml file then picks the stuff to actually
write. For systemwide packages, a systemwide.toml (local) file
is used instead.