We don't and can't use fedora-deps.repo anymore

With our use of Travis CI and inclusion in Atomic that horse
has left the barn. We're also buildable on other distros.

The upshot of this is that we have to be more careful with our
dependencies. This is expected as we mature.

Closes #490
Reviewed-by: Marius Vollmer <marius.vollmer@redhat.com>
Signed-off-by: Marius Vollmer <marius.vollmer@redhat.com>