Added simple round robin example with websocket support

examples/balancer/simple-balancer-with-websockets.js

@@ -0,0 +1,39 @@
+var httpProxy = require('../../lib/node-http-proxy');
+//
+// A simple round-robin load balancing strategy.
+// 
+// First, list the servers you want to use in your rotation.
+//
+var addresses = [
+  {
+    host: 'ws1.0.0.0',
+    port: 80
+  },
+  {
+    host: 'ws2.0.0.0',
+    port: 80
+  }
+];
+
+var proxies = addresses.map(function (target) {
+  return new httpProxy.HttpProxy({
+    target: target
+  });
+});
+
+function nextProxy() {
+  var proxy = proxies.shift();
+  proxies.push(proxy);
+  return proxy;
+}
+
+var server = http.createServer(function (req, res) {    
+  nextProxy().proxyRequest(req, res);
+});
+
+server.on('upgrade', function(req, socket, head) {
+  nextProxy().proxyWebSocketRequest(req, socket, head);
+});
+
+server.listen(8080);  
+