Fix markdown in the README and add a correspondence between HDFS backends and the port they use
Fix markdown in the README and add a correspondence between HDFS backends and the port they use

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