Add importtables roundup-admin command. I am surprised this doesn't exist. It's the dual of exporttables. Output of exporttables can't be imported by import, so I am not sure why it's useful. I can't find the sourceforge ticket that is referenced in the creation of exporttables. I considered trapping the error generated when import can't find file content, but that's not a great idea as it can mask an invalid/incorrect export and the loss of data associated with it.