Update Getting Started page to include mention of Respond

docs/templates/pages/getting-started.mustache

@@ -138,6 +138,16 @@
 </html>
 </pre>
           <p><strong>And you're set!</strong> With those two files added, you can begin to develop any site or application with Bootstrap.</p>
+
+          <hr>
+
+          <h4>Responsive features in IE8</h4>
+          <p>Internet Explorer 8 lacks support for media queries, the method by which we deliver responsive CSS to folks. To enable that, you need to include a third party tool (which we include in the project repository) called <a href="https://github.com/scottjehl/Respond">Respond.js</a>.</p>
+<pre class="prettyprint linenums">
+&lt;!--[if lt IE 9]&gt;
+  &lt;script src="assets/js/respond/respond.js"&gt;&lt;/script&gt;
+&lt;![endif]--&gt;
+</pre>
         </section>