Update person bio

Refactored to return faculty bio editions via slug, slugs and groupings(school)
This is fairly inefficient. Instead of grabbing all of the faculty, which is costly, it would be better to look up the `BioEdition` by slug and then just ensure that the 1 person it's related to doesn't have a nil `faculty_status`.

Also, I think we want to be using the `Person#slug` rather than `BioEdition#slug`, right?