add preference_min/max to settings endpoint
add preference_min/max to settings endpoint

Duke-GCB/TF-DNA-PredictionsDB,Duke-GCB/iMADS,Duke-GCB/iMADS,Duke-GCB/TF-DNA-PredictionsDB,Duke-GCB/TF-DNA-PredictionsDB,Duke-GCB/iMADS,Duke-GCB/TF-DNA-PredictionsDB,Duke-GCB/iMADS