tweak footer margins/padding

adjusting so footer isn't quite so tall with lits image and sw version
initial import of biographies html fixture from old Beck Center Belfast Group site

[#75852440]
clean up old site bios formatting, add basic schema.org RDFa for harvesting

[#75852440]
fix unclosed link affecting rdfa harvesting
update old site bios to explicitly mark persons as affilated with the group

[#75852440]
fix rdf data prep query for finding people with any connection to the belfast group so it actually works

[#75852440]
html/rdfa fixture with brief bio for Edna Longley

[#75852440]
data prep logic for harvesting from local html/rdfa fixture files

[#75852440]
tweak profile description display so no link will show for unlabeled sources (i.e old BG site bios)

[#75852440]
minor cleanup
note issue with current Group sheet query and untitled works