Merge pull request #76 from aaccomazzi/master

Added property 'ads_scan'
Take first of multiple orcids; add ANREV, ASJ to settings.priorities; fix schema related unittests
SolrAdapter: Pick the first comment when it is multivalued (Solr expects single valued)
Update properties: emoved ads_scan in favor of ads_openaccess, added eprint_openaccess and pub_openaccess