Merge pull request #73 from aaccomazzi/master

read_count is now computed as len(readers)
Implmement vizier, data (+facet) in SolrAdapter; tests updated; closes #71
Merge branch 'master' of https://github.com/adsabs/ADSimportpipeline

Conflicts:
	tests/stubdata/stubdata.py
Add ingestion of "access" in relations.links
Added 'access' to links_data structure in SOLR document