edit pass on T3,4,5, updated images

src/site/docs/tutorials/polymer-intro/examples/stopwatch/build.dart

Index: src/site/docs/tutorials/polymer-intro/examples/stopwatch/build.dart
diff --git a/src/site/docs/tutorials/polymer-intro/examples/stopwatch/build.dart b/src/site/docs/tutorials/polymer-intro/examples/stopwatch/build.dart
deleted file mode 100644
index 1715d5ecf7cc4f1e3d2fb39491312f7a0faa1fe8..0000000000000000000000000000000000000000
--- a/src/site/docs/tutorials/polymer-intro/examples/stopwatch/build.dart
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/usr/bin/env dart
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-import 'package:polymer/builder.dart';
-
-void main() {
-  build(entryPoints: ['web/index.html']); // lint and optionally build
-}