updates to README
updates to README

intentionet/batfish,arifogel/batfish,intentionet/batfish,dhalperi/batfish,batfish/batfish,intentionet/batfish,intentionet/batfish,arifogel/batfish,batfish/batfish,dhalperi/batfish,arifogel/batfish,intentionet/batfish,batfish/batfish,dhalperi/batfish