include link posts in post index, with external url, timestamp

_layouts/post-index.html

@@ -47,8 +47,14 @@
       {% endif %}
     {% endunless %}
     <article>
-      <h2><a href="{{ site.url }}{{ post.url }}" title="{{ post.title }}">{{ post.title }}</a></h2>
-      <p>{% if post.description %}{{ post.description }}{% else %}{{ post.content | strip_html | strip_newlines | truncate: 120 }}{% endif %}</p>
+      {% if post.link %}
+        <h4><a href="{{ post.link }}" target="_blank" title="{{ post.title }}">{{ post.title }}</a></h4>
+        <p><a href="{{ site.url }}{{ post.url }}" title="{{ post.title }}">{{ post.date | date: "%B %d %H:%M %Z"}}</p>
+        <p>{{ post.content }}</p>
+      {% else %}
+        <h2><a href="{{ site.url }}{{ post.url }}" title="{{ post.title }}">{{ post.title }}</a></h2>
+        <p>{% if post.description %}{{ post.description }}{% else %}{{ post.content | strip_html | strip_newlines | truncate: 120 }}{% endif %}</p>
+      {% endif %}
     </article>
   {% endfor %}
 </div><!-- /#index -->