Added how it works section.
Added how it works section.

jayfk/docker-logentries,edyn/docker-docker-stats-statsd,secondrotation/docker-logentries,mihaidma/docker-logentries,logentries/docker-logentries,meteorhacks/docker-librato,brandedme/librato,zvelo/docker-logentries,meteorhacks/docker-librato,dberesford/docker-logentries,edyn/docker-docker-stats-statsd,jaydeep17/docker-logentries,brandedme/librato,rosskukulinski/docker-swarm-monitoring,zvbuhl/docker-logentries,qwaya/docker-logentries,StephenHynes7/docker-logentries,pelger/docker-logentries,rosskukulinski/docker-swarm-monitoring