Additional dates for story updates

by Librarian last modified 2020-07-04T13:28:05-04:00

A couple metadata entries added for stories and chapters to easily track when the stories were updated. When the story and chapter published for public view, the "first published" date was recorded. Whenever a new chapter added within a story, the story's "last addition" date was updated too. Any changes / modifications to stories / chapters are still marked by "last modified" date.