Rename remove_citation to remove_citation_refs and make it apply to a citation_handle_list.
Updated tool/Check.py to change check_source_references into check_citation_references
svn: r18433
This is a major patch by Michael Nauta. It means all writes happen immediately to bsddb, and the bsddb
rollback is used on a crash. Transaction is no longer used to store changes and do them on commit.
Undo database is set on end.
At the same time with statement is used throughout for transactions
At the same time, the original bug in merge code should be fixed
Still some issues, that will be ironed out
svn: r16523
