(GH-98) add enumeration extensions
(GH-98) display fields for moderation
(GH-98) Enhance package status changes

When reviewing, don't call mark package listed. The changepackagestatus method
should be able to do everything it needs to change package statuses, including
notifying the indexing service and updating the latest package.
(GH-98) text area format for review
(GH-98) Ensure only admins can submit package status changes
(GH-98) Allow moderators to review packages

This allows moderators to review and change package statuses for any packages,
even those that have been reviewed before, exempted, or priorly listed packages.