Add G.info method
Add G.info method

Fixes [16].

--HG--
extra : convert_revision : svn%3A3ed01bd8-26fb-0310-9e4c-ca1a4053419f/networkx/trunk%40126

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