[Example] Add example of service registration

Add an example of registering a plain service
with Angular. WTD-518.

example/builtins/src/ExampleService.js

@@ -0,0 +1,25 @@
+/*global define,Promise*/
+
+/**
+ * Module defining ExampleService. Created by vwoeltje on 11/4/14.
+ */
+define(
+    [],
+    function () {
+        "use strict";
+
+        /**
+         *
+         * @constructor
+         */
+        function ExampleService() {
+            return {
+                getMessage: function () {
+                    return "I heard this from a service";
+                }
+            };
+        }
+
+        return ExampleService;
+    }
+);