Fixes #9073: add note to homepage about download differences

assets/css/docs.css

@@ -123,7 +123,7 @@ body {
 
 /* Download button */
 .bs-masthead .btn-outline {
-  margin-top: 5px;
+  margin-top: 20px;
   margin-bottom: 5px;
   padding: 18px 24px;
   font-size: 21px;
@@ -833,7 +833,7 @@ input.focused {
   .bs-masthead h1 {
     font-size: 100px;
   }
-  .bs-masthead p {
+  .bs-masthead .lead {
     margin-left: 15%;
     margin-right: 15%;
     font-size: 30px;

index.html

@@ -8,6 +8,7 @@ base_url: "./"
   <div class="container">
     <h1>Bootstrap 3</h1>
     <p class="lead">Sleek, intuitive, and powerful mobile-first front-end framework for faster and easier web development.</p>
+    <p><strong>Heads up!</strong> Until the final v3 is released, downloads may be behind the development branch and Bower package.</p>
     <p>
       <a href="{{ site.download_dist }}" class="btn btn-outline btn-lg" onclick="_gaq.push(['_trackEvent', 'Jumbotron actions', 'Download', 'Download 3.0.0 RC1']);">Download Bootstrap</a>
     </p>