Triggered Event Log: Add title and author columns for hold-related events

Triggered Event Log: Add title and author columns for hold-related events

Correcting an omission spotted by Sally Fortin.

NOTE:  This adds pcrud as a controller to ahr.  Only the retrieve
operation is allowed at this time, and only with a VIEW_HOLD permission
at the pickup lib (same setup as ahopl, the class powering the new pull
list).

Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>
Signed-off-by: Mike Rylander <mrylander@gmail.com>