feat(testability): add an initial scaffold for the testability api

Make each application component register itself onto the testability
API and exports the API onto the window object.

modules/examples/src/hello_world/index_static.js

@@ -21,6 +21,7 @@ import {StyleInliner} from 'angular2/src/core/compiler/style_inliner';
 import {CssProcessor} from 'angular2/src/core/compiler/css_processor';
 import {EventManager} from 'angular2/src/core/events/event_manager';
 import {PrivateComponentLoader} from 'angular2/src/core/compiler/private_component_loader';
+import {TestabilityRegistry, Testability} from 'angular2/src/core/testability/testability';
 
 import {reflector} from 'angular2/src/reflection/reflection';
 
@@ -185,6 +186,18 @@ function setup() {
     "annotations": []
   });
 
+  reflector.registerType(TestabilityRegistry, {
+    "factory": () => new TestabilityRegistry(),
+    "parameters": [],
+    "annotations": []
+  });
+
+  reflector.registerType(Testability, {
+    "factory": () => new Testability(),
+    "parameters": [],
+    "annotations": []
+  });
+
   reflector.registerGetters({
     "greeting": (a) => a.greeting
   });