I was trying to keep the mapping between E.property_id and E.property_id in a separate file than the original .csv file that contains restaurant data that we use in the ```import_data``` command. Hence the ```exporter``` and ```importer``` commands. I do not think we will need the exporter anymore, really. I just committed it as I needed it for something earlier and I wrote it. Importer should stay (or could be incorporated into the ```import_data``` command).