Merge pull request #9011 from Rycul/patch-1

Added short instruction for obtaining respond.js in example HTML code (see description).

getting-started.html

@@ -112,7 +112,7 @@ bootstrap/
     <!-- Include all compiled plugins (below), or include individual files as needed -->
     <script src="js/bootstrap.min.js"></script>
 
-    <!-- Optionally enable responsive features in IE8 -->
+    <!-- Optionally enable responsive features in IE8. Respond.js can be obtained from https://github.com/scottjehl/Respond -->
     <script src="js/respond.js"></script>
   </body>
 </html>