Takes an internal event and re-emits it as the parent and with an alias.

node-id3 event relay

	processor.emit = function() {
	  var event = arguments[0];
	  var value = arguments[1];
	  //emit original event
	  self.emit(event, value);
	  
	  //rewrite to new alias
	  for(var i in MAPPINGS){
	    var current = MAPPINGS[i];
	    if(current.from.indexOf(event) > -1){
		  self.emit(current.to, value);
	    }
	  }
	}