Fix in gene network tutorial
Fix in gene network tutorial

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