New TOC for dart-by-example page

src/site/index.html

 ---
 layout: homepage
 js:
 - url: /js/display-news.js
 - url: /js/os-switcher.js
   defer: true
 - url: /js/editor-downloads-analytics.js
   defer: true
 - url: /js/front-page-analytics.js
   defer: true
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                 <p>Dart has lots of <a href="#tools">tools</a>,
                 <a href="#libraries">libraries</a>, and documentation,
                 plus a developer community.</p>
                 <a href="/docs/"><i class="sprite-icon-triangle"></i>Learn more</a>
               </div>
             </div>
           </div>
         </div>
         <div class="row">
           <div class="col-md-10 col-md-offset-1 browser-support">
-            <p>All modern browsers (both desktop and mobile) can run Dart web apps, thanks to our
-            <a href="#dart2js">Dart-to-JavaScript compiler</a>.</p>
+            <p>Dart runs in modern web browsers and on the server.</p>
             <i class="sprite-icon-browsers"></i>
           </div>
         </div>
       </section>
 
       <section class="dart-new-language sec-shadow" id="code">
         <div class="row">
           <div class="col-md-10 col-md-offset-1">
             <h2>Dart is new, yet familiar</h2>
 
@@ skipping 354 matching lines @@
             <b>Note:</b>
             You can write Dart apps using any recent version of
             {% include os-choices.html %}
             The Dart development tools <b>do not&nbsp;support Windows XP</b>.
             Dart Editor requires Java version 6 or higher.
           </aside>
         </div>
       </section>
     </div> <!-- end container -->
   </div> <!-- end container-page -->