Make tracker-miners dependency optional
Since commit 7f19a036, tracker-miners become a hard dependency, because nautilus won't run without the schemas from the tracker-miners package installed on the system.
I would suggest to make this dependency optional by checking the existence of the org.freedesktop.Tracker.Miner.Files
schema by g_settings_schema_source_lookup()
function before reading the index-recursive-directories
setting.