Apply Abstract{Event,Location} changes to progenitor events and venues
Script to seed Abstract{Event,Location}s from existing events and venues
Fix the show more links in the event widget
Ensure multi-day events are placed at the top of each day's events list

This is needed at the moment to help prevent ugly gaps in the event list
and to keep the extra (+more) events list from bleeding into subsequent
days' events lists and covering their +more links.