GUI: Updated help (index)

gui/help/index.html

@@ -8,6 +8,14 @@
 
 <p>With the Cppcheck GUI you can analyze your code.</p>
 
+<h2>Contents</h2>
+
+<p>If you want to get started, look at the <a href="walkthrough.html">walk through</a>.</p>
+
+<h2>Example</h2>
+
+<blockquote><img src="images/index-mainwindow.png"></blockquote>
+
 </body>
 </html>
 

gui/help/online-help.qhp

@@ -19,6 +19,7 @@
         </keywords>
         <files>
           <file>index.html</file>
+          <file>images/index-mainwindow.png</file>
           <file>investigating-warnings.html</file>
           <file>preferences.html</file>
           <file>projectfiledialog.html</file>