a test implementation of updating source after write to DB.
More None strings. Filter None just before calling _save_base.
Fixed not calling _none_filter as a method.
Likewise, fixed missing self on _none_filter
Hmm, another fix related to the last two commits.
Nothing to see here...
fix bad logic.
Support rows that unpack into a list of ORM objects.
Allow passing of persist_objects flag on the Fabric env object.
Apply none filter also when we've used the ID to get an existing object for updating.
Support conditional updating of objects, based on a datetime field
Write last_modified after save to DB
Remove preceding and trailing whitespace, usually errors from content editors, from strings.
Fix bug for id lookups, and implement logic for last_modified
Need a dependency from Django.