These filter on the fields of the same name in biblio.record_entry.
e.g.
create_date(,2013-02-01) => records created before 2013-02-01
create_date(2013-02-01) => records created since 2013-02-01
create_date(2013-02-01,2013-02-28) => records created in Feb 2013
create_date(yesterday) => records since created yesterday
[LFW] Reviewed and added a single missing 'use' line; rewrote commit
message; release note.
Signed-off-by: Mike Rylander <mrylander@gmail.com> Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com> Signed-off-by: Mike Rylander <mrylander@gmail.com>