Removed extraneous sorting of facet categories, leaving it to the order of the facet fields in the request to set order.  All the maps and sets in SearchSettings declared as generic interfaces.
Display collection placeholder image instead of the fake thumbnails from the static folder now.  Browse link from container full record page correctly going to just the first tier of results again.  Turned logging back down to warn.
Fedora content streaming prioritizing fedora headers for content length and mimetype over those from solr when present and valid to avoid getting incorrect data back when requesting datastreams before the object they belong to has been updated in Solr.  Cleaned up some system.out statements