Renamed external_db.display_label to db_display_name to distinguish it from similarly-named column in xref.

Created; parses regulatory feature data from a cisRed database dump into a file suitable for loading with load_regulatory.pl. Ideally load_regualatory.pl should be able to understand different file formats (with some command-line hint as to what it's looking it) and so remove the need for this intermediate step

add upstream/downstream flanking 5kb around transcript when consider a variation is involved in the transcript