Merge external "gsd-printer" binary into daemon
@hadess
Submitted by Bastien Nocera Link to original bug (#772767)
Description
Now that we've split up gnome-settings-daemon into smaller daemons, we shouldn't need to run gsd-printer separately from the gsd-print-notifications daemon.
This might be slightly problematic if gsd-printer hangs though, so we might want to wait until we use systemd for the session handling.