Mojo JS Bindings: Update User's Guide, examples

examples/js/hello.js

Index: examples/js/hello.js
diff --git a/examples/js/hello.js b/examples/js/hello.js
index 136b1481a2ea9d642844f1ed561cbd6e48c978ac..4b208ce08f100f80c8352f33ab408eddb786d71e 100644
--- a/examples/js/hello.js
+++ b/examples/js/hello.js
@@ -9,9 +9,11 @@
 define("main", [
   "console",
   "mojo/services/public/js/application",
-], function(console, appModule) {
+], function(console, application) {
 
-  class Hello extends appModule.Application {
+  var Application = application.Application;
+
+  class Hello extends Application {
     initialize(args) {
       console.log(this.url + ": Hello");
       if (args && args.length == 2) // args is a nullable parameter