Add feedburner

Author: José Valim

_includes/bottom.html

@@ -8,7 +8,7 @@
     <div class="wrap">
       <div id="social">
         <ul>
-          <li class="menu-item"><a href="/atom.xml" target="_blank"><img src="/images/social/RSS.png" /></a></li>
+          <li class="menu-item"><a href="http://feeds.feedburner.com/ElixirLang" target="_blank"><img src="/images/social/RSS.png" /></a></li>
           <li class="menu-item"><a href="https://github.com/elixir-lang" target="_blank"><img src="/images/social/Github.png" /></a></li>
         </ul>
       </div>

_includes/top.html

@@ -4,7 +4,7 @@
   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
   <title>{% if page.title %}{{ page.title }} - {% endif %}Elixir</title>
-  <link href="http:/elixir-lang.org/atom.xml" rel="alternate" title="Elixir's Blog" type="application/atom+xml" />
+  <link href="http://feeds.feedburner.com/ElixirLang" rel="alternate" title="Elixir's Blog" type="application/atom+xml" />
   <link rel="stylesheet" type="text/css" href="/css/style.css">
   <link rel="stylesheet" type="text/css" href="/css/syntax.css">
   <link rel="shortcut icon" href="/images/logo/drop.png">

_layouts/blog.html

@@ -7,7 +7,7 @@
 <div id="sidebar-primary" class="sidebar">
   {% include search.html %}
   <div class="rss-button">
-    <a href="/atom.xml" target="_blank"><img src="/images/social/RSSButton.png" /></a>
+    <a href="http://feeds.feedburner.com/ElixirLang" target="_blank"><img src="/images/social/RSSButton.png" /></a>
   </div>
   {% include categories-list.html %}
   {% include important-links.html %}