Add cargo info to the README
Add cargo info to the README

zhangf911/mio,tailhook/mio,bottompawn/mio,fuchsia-mirror/third_party-mio,asomers/mio,alexcrichton/mio,marjakm/mio,zslayton/mio,hjr3/mio,pythonesque/mio,rrichardson/mio,jamwt/mio,fuchsia-mirror/third_party-mio,echochamber/mio,murarth/mio,thijsc/mio,fhartwig/mio,tempbottle/mio,geofft/mio,dwrensha/mio,mneumann/mio,luca-barbieri/mio,arthurprs/mio,yangxingpping/mio,yuikns/mio,rryan/mio,jamwt/mio,dpc/mio,polyfractal/mio,mneumann/mio,greensnark/mio,carllerche/mio,carllerche/mio,frewsxcv/mio,zhangf911/mio,polyfractal/mio,danburkert/mio,mlalic/mio,asomers/mio