remove debugging for multiple group by; drop title column for na_sources (not used by UI plus part of acs_objects with 5.2) and made user_id optional for source::new; still need to deal with the group by issue on index page - now, the first grouping (pub date) is not applied when there is only one source (source_id being the second grouping
lots of little tweaks for data cleanup on uninstantiate, some more UI work, bug fixes, etc.; added daveb's sweeper proc; not tagging v0.9.8 just yet though