added importNode (piggybacking on cloneNode) for 37% passing (level2/core)
added importNode (piggybacking on cloneNode) for 37% passing (level2/core)

crealogix/jsdom,Ye-Yong-Chi/jsdom,AVGP/jsdom,mzgol/jsdom,Ye-Yong-Chi/jsdom,snuggs/jsdom,lcstore/jsdom,zaucy/jsdom,substack/jsdom,AshCoolman/jsdom,robertknight/jsdom,jeffcarp/jsdom,janusnic/jsdom,janusnic/jsdom,evdevgit/jsdom,kangax/jsdom,substack/jsdom,selam/jsdom,Joris-van-der-Wel/jsdom,evanlucas/jsdom,beni55/jsdom,brianmcd/cloudbrowser-jsdom,iizukanao/jsdom,matthewpflueger/jsdom,evdevgit/jsdom,jeffcarp/jsdom,dexteryy/jsdom-nogyp,fiftin/jsdom,selam/jsdom,tmpvar/jsdom,nicolashenry/jsdom,oelmekki/jsdom,cpojer/jsdom,snuggs/jsdom,szarouski/jsdom,susaing/jsdom,kittens/jsdom,AshCoolman/jsdom,Joris-van-der-Wel/jsdom,kittens/jsdom,sebmck/jsdom,cpojer/jsdom,sirbrillig/jsdom,danieljoppi/jsdom,iizukanao/jsdom,susaing/jsdom,janusnic/jsdom,isaacs/jsdom,szarouski/jsdom,cpojer/jsdom,sebmck/jsdom,medikoo/jsdom,Sebmaster/jsdom,evanlucas/jsdom,szarouski/jsdom,sebmck/jsdom,fiftin/jsdom,sirbrillig/jsdom,danieljoppi/jsdom,godmar/jsdom,vestineo/jsdom,zaucy/jsdom,kesla/jsdom,concord-consortium/jsdom,lcstore/jsdom,selam/jsdom,jeffcarp/jsdom,vestineo/jsdom,darobin/jsdom,danieljoppi/jsdom,kittens/jsdom,mbostock/jsdom,evanlucas/jsdom,susaing/jsdom,beni55/jsdom,medikoo/jsdom,zaucy/jsdom,Sebmaster/jsdom,darobin/jsdom,beni55/jsdom,matthewpflueger/jsdom,Joris-van-der-Wel/jsdom,papandreou/jsdom,nicolashenry/jsdom,medikoo/jsdom,AVGP/jsdom,kevinold/jsdom,Ye-Yong-Chi/jsdom,mzgol/jsdom,evdevgit/jsdom,dexteryy/jsdom-nogyp,mbostock/jsdom,concord-consortium/jsdom,aduyng/jsdom,nicolashenry/jsdom,brianmcd/cloudbrowser-jsdom,lcstore/jsdom,isaacs/jsdom,godmar/jsdom,robertknight/jsdom,kesla/jsdom,mbostock/jsdom,kevinold/jsdom,singlebrook/linkck,Sebmaster/jsdom,darobin/jsdom,aduyng/jsdom,sirbrillig/jsdom,crealogix/jsdom,fiftin/jsdom,Zirro/jsdom,tmpvar/jsdom,robertknight/jsdom,AshCoolman/jsdom,Zirro/jsdom,oelmekki/jsdom,kangax/jsdom,vestineo/jsdom,papandreou/jsdom,mzgol/jsdom,kevinold/jsdom,kesla/jsdom,aduyng/jsdom