add networkx dep to setup.py
corrections for title typos and discrepancies
minor clean-up/corrections to support group sheet smushing from TEI RDF
include local/dev belfast site urls in harvest list for building test dataset
correct another title typo
ignore local download copies of viaf, geonames, dbpedia
preliminary data prep step to infer connections (groupsheet author => affiliated with group)
update urls to harvest data from staging sites
preliminary test data for belfast group network