updated readme to include more documentation on elasticsearch server connecion
updated readme to include more documentation on elasticsearch server connecion

guumaster/mongoosastic,teambition/mongoosastic,mongoosastic/mongoosastic,mallzee/mongoosastic,hdngr/mongoosastic,ennosol/mongoosastic,guumaster/mongoosastic,francesconero/mongoosastic,ennosol/mongoosastic,francesconero/mongoosastic,avastms/mongoosastic,mallzee/mongoosastic,hdngr/mongoosastic,teambition/mongoosastic,mongoosastic/mongoosastic,avastms/mongoosastic,mallzee/mongoosastic,hdngr/mongoosastic,guumaster/mongoosastic,mongoosastic/mongoosastic