feat(WebWorkers): Add WebWorker Todo Example. Add support for more DOM events.

Fixed breakage caused by previous DI commit in WebWorker Todo example

modules/examples/e2e_test/web_workers/todo/todo_spec.dart

@@ -0,0 +1,5 @@
+library examples.e2e_test.web_workers.todo_spec;
+
+main() {
+
+}

modules/examples/e2e_test/web_workers/todo/todo_spec.ts

@@ -0,0 +1,20 @@
+import {verifyNoBrowserErrors} from 'angular2/src/test_lib/e2e_util';
+import {Promise} from 'angular2/src/facade/async';
+
+describe('WebWorkers Todo', function() {
+  afterEach(verifyNoBrowserErrors);
+
+  var URL = "examples/src/web_workers/todo/index.html";
+
+  it('should bootstrap', () => {
+    browser.get(URL);
+
+    waitForBootstrap();
+    expect(element(by.css("#todoapp header")).getText()).toEqual("todos");
+  });
+
+});
+
+function waitForBootstrap(): void {
+  browser.wait(protractor.until.elementLocated(by.css("todo-app #todoapp")), 5000);
+}