removing Web UI tutorials, updating remaining 4 to current release, + review pass

src/site/tools/editor/index.markdown

 ---
 layout: default
 title: "Dart Editor"
 description: "Get Dart Editor, a custom, powerful editor for Dart developers."
 has-permalinks: false
 js:
 - url: /js/os-switcher.js
   defer: true
 - url: /js/editor-downloads-analytics.js
   defer: true
@@ skipping 84 matching lines @@
   However, you might want to set environment variables,
   as described in the <a href="/tools/sdk/">SDK page</a>.
 </p>
 
 
 ## Using Dart Editor {#using}
 
 To get started with Dart Editor,
 read these:
 
-[Target 1: Get Started](http://www.dartlang.org/docs/tutorials/get-started/) (the first tutorial in _A Game of Darts_)
+[Get Started](http://www.dartlang.org/docs/tutorials/get-started/) (the first tutorial in the _Dart Tutorials_)
 : Gently introduces you to Dart Editor,
   from downloading it to creating and running apps.
 
 [Up and Running](/docs/dart-up-and-running/contents/ch01.html#ch01-editor) (a section from Chapter 1 of _Dart Up and Running_)
 : Quickly leads you through downloading Dart Editor,
   running a sample,
   and creating an app.
 
 For details on _using_ Dart Editor,
 read this:
@@ skipping 131 matching lines @@
   <a href="https://code.google.com/p/dart/issues/list?can=2&amp;q=label%3AArea-Editor">Dart Editor issue list</a>.
 </p>
 
 
 ## Troubleshooting
 
 [Troubleshooting Dart Editor](troubleshoot.html)
 gives solutions to problems you might encounter
 when installing and launching Dart Editor.