Adds link element for RSS feed

Author: javiercejudo

_layouts/default.html

@@ -16,6 +16,7 @@
     <![endif]-->
 
     <link rel="stylesheet" type="text/css" href="{{ site.baseurl }}/style.css" />
+    <link rel="alternate" type="application/rss+xml" title="{{ site.name }}" href="{{ site.baseurl }}/feed.xml" />
 
     <!-- Created with Jekyll Now - http://github.com/barryclark/jekyll-now -->
   </head>