Add subscribe to rss button to the blog page.

source/blog/index.html

@@ -22,6 +22,11 @@ blog_index: true
           </div>
         </div>
       </div>
+      <div class="span3">
+        <a href="{{ site.subscribe_rss }}" class="btn btn-primary" rel="subscribe-rss" title="Subscribe via RSS">Subscribe via RSS</a>
+      </div>
+      <br />
+      <br />
       {% include twitter_bar.html %}
     </div>
   </div>

[Sid Sijbrandij]