add a name: and mark it as required

src/site/docs/pub-package-manager/index.markdown

 ---
 layout: default
 title: "Pub: Getting Started"
 description: "How to get up and running with pub."
 has-permalinks: true
 ---
 
 # {{ page.title }}
 
 <!-- TODO(rnystrom): Link **terms** to glossary when that exists. -->
@@ skipping 97 matching lines @@
 One of pub's main jobs is managing **dependencies**. A dependency is just
 another package that your package relies on. If your app is using some
 templating framework called "handle_stache", then your app package will depend
 on the `handle_stache` package.
 
 <!-- TODO(rnystrom): Use a real package here when we have one. -->
 
 You specify your package's dependencies in the pubspec, like so:
 
 {% highlight yaml %}
+name: double_rainbows
 dependencies:
   handle_stache:
     git: git://github.com/munificent/handle_stache.git
 {% endhighlight %}
 
 Here, we are declaring a dependency on some (fictional) `handle_stache` package
 that we want to install from [Git](http://git-scm.com/) using the given URL.
 
 <!-- TODO(rnystrom): Use a pub.dartlang.org dep when that's live. -->
 
@@ skipping 101 matching lines @@
 <aside class="alert alert-info">
 In the future, you'll be able to set this per project, instead of globally.
 </aside>
 
 ## Learning more
 
 <a href="versioning.html">
   <i class="icon-hand-right icon-white">&nbsp;</i>
   Learn more about pub's approach to versioning
 </a>