xbrlDB: optimize bulk insert performance when return of sequence IDs not required
xbrlDB DPM db bulk insert: correct nil typed dim values, optimize performance
xbrlDB: SEC semantic SQL: obtain entity information from sgml file when no rss feed present
(so that entire filing including entity information can be loaded from
instance document or -xbrl.zip/instance url, without any feed present);
useful to bulk reload instances with internet communication exceptions.