Provide reference URLs that point to human-readable resources

[marfox]

Instead of HTML visualizations of RDF resources, where it is hard to find the relevant piece of information.

1. ULAN: replace http://vocab.getty.edu/ulan/500015963 with http://vocab.getty.edu/page/ulan/500015963
2. British Museum: http://collection.britishmuseum.org/id/person-institution/159306 should be http://www.britishmuseum.org/research/search_the_collection_database/term_details.aspx?bioId=9554 (don't know how to automatically resolve it, though)

[marfox]

There seems to be no easy way to deal with point 2 above