MODIFY the README, fixing the subscription example
MODIFY the README, fixing the subscription example

telefonicaid/fiware-cygnus,Fiware/data.Cygnus,telefonicaid/fiware-cygnus,Fiware/data.Cygnus,Fiware/context.Cygnus,telefonicaid/fiware-cygnus,telefonicaid/fiware-cygnus,Fiware/data.Cygnus,Fiware/context.Cygnus,Fiware/context.Cygnus,Fiware/context.Cygnus