Add graph attributes when parsing GML. Addresses #480
Add graph attributes when parsing GML.
Addresses #480

blublud/networkx,aureooms/networkx,ionanrozenfeld/networkx,bzero/networkx,Sixshaman/networkx,ghdk/networkx,ltiao/networkx,bzero/networkx,jcurbelo/networkx,blublud/networkx,michaelpacer/networkx,kernc/networkx,RMKD/networkx,aureooms/networkx,jakevdp/networkx,jni/networkx,dhimmel/networkx,cmtm/networkx,dhimmel/networkx,kai5263499/networkx,ionanrozenfeld/networkx,NvanAdrichem/networkx,kernc/networkx,aureooms/networkx,debsankha/networkx,harlowja/networkx,jakevdp/networkx,andnovar/networkx,dmoliveira/networkx,OrkoHunter/networkx,chrisnatali/networkx,dhimmel/networkx,sharifulgeo/networkx,goulu/networkx,ghdk/networkx,jni/networkx,dmoliveira/networkx,dmoliveira/networkx,ionanrozenfeld/networkx,sharifulgeo/networkx,nathania/networkx,harlowja/networkx,jtorrents/networkx,jakevdp/networkx,farhaanbukhsh/networkx,nathania/networkx,beni55/networkx,blublud/networkx,chrisnatali/networkx,debsankha/networkx,farhaanbukhsh/networkx,bzero/networkx,yashu-seth/networkx,farhaanbukhsh/networkx,JamesClough/networkx,chrisnatali/networkx,harlowja/networkx,ghdk/networkx,sharifulgeo/networkx,SanketDG/networkx,kai5263499/networkx,jfinkels/networkx,kai5263499/networkx,RMKD/networkx,tmilicic/networkx,nathania/networkx,jni/networkx,wasade/networkx,kernc/networkx,debsankha/networkx,jtorrents/networkx,RMKD/networkx