transaction_commit): only do secondary index magic if not
instructde otherwise; (BdbTransaction.__init__): accept additional
argument, pass it on to Transaction class.
* src/GrampsDb/_GrampsDbBase.py (Transaction.__init__): accept
additional argument for no_magic.
* src/GrampsDb/_ReadGedcom.py (NoteParser): count people during
first pass; (parse_gedcom_file): start transaction with or without
secondary index magic.
* src/GrampsDb/_ReadXML.py (LineParser):count people during
first pass; (parse): start transaction with or without secondary
index magic.
svn: r5865
487cd028ed