doc cleanup
doc cleanup

liujiantong/gcfg,lanfeust21/gcfg,hurricane1026/gcfg,beardface/gcfg,chentao/gcfg,savaki/gcfg,ruizu/gcfg,liudanking/gcfg,ARGOeu/gcfg,bluele/gcfg,magiccao/gcfg,rexk/gcfg,scalingdata/gcfg,4ydx/gcfg,vanillahsu/gcfg,gdamore/gcfg,deatheyes/gcfg,theckman/gcfg,francoishill/gcfg,xvtom/gcfg,htcuong/gcfg,baobabus/gcfg,freeformz/gcfg,oursky/gcfg,manan19/gcfg