[3.0] a way of creating a new store from the commandline
I suggest we do either my suggestion of making tracker sparql --update create the database if missing ... although now I realize that you'd have to pass the --ontology-path flag in this case, which is not very intuitive either .... or perhaps making tracker endpoint --database=... become a "create new database and exit" operation, perhaps with a message that says "Use the --dbus-service= option if you want to share the new database for other processes".