Add generate_graphml() option. Similar to generate_gexf(). Closes #489
Add generate_graphml() option.
Similar to generate_gexf().
Closes #489

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