revise unit tests for change to permalink (now also schema.org/URL)
stitch back together old two-part splash image
add a view to download gexf version of filtered people,places,orgs network
revise site index to fit full size old splash image
add last-modified methods for rdf & network data, for use in last-modified headers for browser caching [#53395405]
add last modified headers to rdf/network based views, so slow pages can be cached [#53395405]
improve access to alternate person uris and dbpedia properties
display marbl ead bioghist as person description on profile, when available [#49308847]
adjust groupsheet formatting to handle documents with long workshop/poem titles
note about possible issue (profile listing for groupsheet by multiple authors)