Fixed elsevier_client to use os.path.join
Fixed elsevier_client to use os.path.join

jmuhlich/indra,johnbachman/belpy,pvtodorov/indra,sorgerlab/belpy,pvtodorov/indra,johnbachman/indra,bgyori/indra,sorgerlab/indra,bgyori/indra,pvtodorov/indra,johnbachman/belpy,jmuhlich/indra,pvtodorov/indra,johnbachman/belpy,sorgerlab/indra,sorgerlab/belpy,sorgerlab/belpy,sorgerlab/indra,jmuhlich/indra,johnbachman/indra,johnbachman/indra,bgyori/indra