updated nav order

Author: dorafc

doc/_templates/layout.html

@@ -45,11 +45,11 @@
 
     <nav class="main-nav">
         <ul>
-           <li><a href="{{ pathto('tutorials/index') }}">Tutorials</a></li>
-           <li><a href="{{ pathto('gallery/index') }}">Sample Plots</a></li>
-           <li><a href="{{ pathto('devel/index') }}">Contributing</a></li>
-           <li><a href="{{ pathto('contents') }}">Documentation</a></li>
-           <li><a href="{{ pathto('users/installing') }}">Installation</a></li>
+            <li><a href="{{ pathto('users/installing') }}">Installation</a></li>
+            <li><a href="{{ pathto('contents') }}">Documentation</a></li>
+            <li><a href="{{ pathto('gallery/index') }}">Examples</a></li>
+            <li><a href="{{ pathto('tutorials/index') }}">Tutorials</a></li>
+            <li><a href="{{ pathto('devel/index') }}">Contributing</a></li>
         </ul>
      </nav>
 {%- endblock %}