updates to support iojs

- added socket.on('error')
- added socket keep alive.

Author: itayw

lib/stomp.js

@@ -361,6 +361,10 @@ var Stomp = module.exports = function () {
    */
   var setupListeners = function () {
 
+    socket.setKeepAlive(true);
+    socket.on('error', function(err){
+      log.debug('error: ' + err);
+    });
     socket.on('drain', function (data) {
       log.debug('on drain');
     });