Added custom logger instance

Author: vladferix

lib/stomp.js

@@ -65,7 +65,7 @@ var Stomp = module.exports = function() {
 
         var debug = args.debug || false;
         var StompLogger = require('./stomp.logger.js');
-        log = new StompLogger(debug);
+        log = options.logger || new StompLogger(debug);
 
         subscribedTo = {};
         session = null;