Always add a fake root during rank phase
Always add a fake root during rank phase

cpettitt/dagre,kdawes/dagre,abduld/dagre,shelsonjava/dagre,cpettitt/dagre,lmcorbo/dagre,abduld/dagre,tylingsoft/dagre-layout,9n/dagre,tylingsoft/dagre-layout,cpettitt/dagre,GerHobbelt/dagre,shelsonjava/dagre,9n/dagre,shelsonjava/dagre,lmcorbo/dagre,GerHobbelt/dagre,GerHobbelt/dagre,witcxc/dagre,abduld/dagre,9n/dagre,kdawes/dagre,kdawes/dagre,witcxc/dagre,lmcorbo/dagre