Add .jumbotron with headline and dummy .lead.

docs/examples.html

@@ -8,12 +8,23 @@ slug: examples
 <script type="text/javascript" src="dist/js/i18n/es.js"></script>
 
 <style type="text/css">
-.img-flag {
-  height: 15px;
-  width: 18px;
-}
+  .img-flag {
+    height: 15px;
+    width: 18px;
+  }
 </style>
 
+<section class="jumbotron">
+  <div class="container">
+    <h1>
+      Examples
+    </h1>
+    <p class="lead">
+      Lorem ipsum.
+    </p>
+  </div>
+</section>
+
 <div class="container">
   <section id="basic" class="row">
     <div class="col-md-4">