Add a device_table parameters to Command::importTable() and add_imported_dives(). The content of this table will be added to the global device list (respectively removed on undo). This is currently a no-op, as the parser doesn't yet fill out the device table, but adds devices directly to the global device table. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>