Fix tags layout

_layouts/tag_page.html

@@ -3,7 +3,7 @@ layout: default
 ---
 <h2>{{ page.tag }}</h2>
 <ul>
-{% for post in page.posts %}
+{% for post in site.tags[page.tag] %}
   <li><a href="{{ post.url }}">{{ post.title }}</a> ({{ post.date | date_to_string }} | Tags: {{ post | tags }})</li>
 {% endfor %}
 </ul>