adding a note about Bootstrap CDN sometimes taking a few minutes to catch up.

src/get-started.html

@@ -29,6 +29,7 @@ relative_path: ../
 {% highlight html %}
 <link href="//netdna.bootstrapcdn.com/font-awesome/{{ site.fontawesome.version }}/css/font-awesome.css" rel="stylesheet">
 {% endhighlight %}
+        <p class="alert alert-success"><i class="fa fa-info-circle"></i> Immediately after release, it takes a bit of time for BootstrapCDN to catch up and get the newest version live on their CDN.</p>
       </li>
       <li>
         Pat yourself on the back for your scalable-vector-icons-on-the-website