changes to get it to do what I think it should do - 1) staging and staging2, 2) add an initial mapping_set entry if this is  new species 3) warn if there is no mapping_set entry but this is not a new species - in this case I the genebuilders should be adding the old one since this is the scenario we want to catch! (need to check the assembly hasn't changed), 4) dry_run, ie preview mode