edit pass on T3,4,5, updated images

src/site/docs/tutorials/shared-pkgs/index.markdown

 ---
 layout: default
 title: "Install Shared Packages"
 description: "Packages are bundles of source code, tools, and resources that help you to organize and share code"
 has-permalinks: true
 tutorial:
   id: packages
 next: polymer-intro/
 next-title: "Define a Custom Element"
 prev: remove-elements/
@@ skipping 30 matching lines @@
 </div>
 
 Now that you're able to create and run a Dart application
 and have a basic understanding of DOM programming,
 you are ready to leverage code written by other programmers.
 Many interesting and useful packages of reusable Dart code
 are available at the
 <a href="https://pub.dartlang.org/">pub.dartlang.org</a>
 repository.
 
-This target shows you how to use `pub`&mdash;a package manager
+This tutorial shows you how to use `pub`&mdash;a package manager
 that comes with Dart&mdash;to
 install one of the packages in the repository,
 the vector_math package.
 You can follow these same steps to install any package hosted at
 <a href="https://pub.dartlang.org/">pub.dartlang.org</a>;
 just change the package name when you get to that step.
-This target also describes some of the resources you can expect to find
+This tutorial also describes some of the resources you can expect to find
 in a well-built package.
 
 * [About the pubspec.yaml file](#about-pubspec)
 * [Name the package dependencies](#name-dependencies)
 * [Install the package dependencies](#install-dependencies)
 * [What did you get (and not get)?](#about-packages)
 * [Import libraries from a package](#use-package)
 * [Other resources](#other-resources)
+* [What next?](#what-next)
 
 ##About the pubspec.yaml file {#about-pubspec}
 
 To use an external package,
 your application must itself be a package.
 Any application with a valid pubspec.yaml file in its top-level directory
 is a package and can therefore use external packages.
 When you create an application using Dart Editor,
 Dart Editor automatically creates a `pubspec.yaml` file.
 
@@ skipping 209 matching lines @@
 
 <ul>
   <li>
     Dart developers share packages at
     <a href="https://pub.dartlang.org/">pub.dartlang.org</a>.
     Look there for packages that might be useful to you,
     or share your own Dart packages.
     See the <a href="https://pub.dartlang.org/doc/">pub documentation</a>
     to get started using and sharing packages.
   </li>
-  <li>
-    One important package that you will find there
-    is
-    <a href="https://pub.dartlang.org/packages/web_ui">web_ui</a>&mdash;a package
-    created by the Dart team that lets you use Web components and templating.
-    The
-    <a href="/docs/tutorials/web-ui/">next target</a> covers Web UI.
-  </li>
 </ul>
 
+##What next? {#what-next}
+
+One package at pub.dartlang.org is Polymer.dart,
+which makes writing web applications easier
+with data binding, templates, and declarative event handlers.
+Check out the next tutorial,
+[Define a Custom Element](/docs/tutorials/polymer-intro),
+for an introduction to Polymer.
+
+
 {% endcapture %}
 
 {% include tutorial.html %}