Comment 1 for bug 1366026

Branch here: http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/collab/jboyer/lp1366026_active_date

It's been tested on a 2.5.2 system, but the changes apply cleanly to master also. If an active date doesn't exist for an item the create date is used anyway.