feat: add archive view of posts

src/content/pages/posts.html

@@ -3,14 +3,9 @@ permalink: /posts/index.html
 layout: "base"
 ---
 
+{% set posts = collections.posts | organizeByDate %}
 <h1>All posts</h1>
 <p>
     View all <a href="/tags">tags</a>
 </p>
-<ul>
-    {% for post in collections.posts %}
-        <li>
-            <a href={{ post.url }}>{{ post.data.title }}</a>
-        </li>
-    {% endfor %}
-</ul>
+{% include "partials/posts.html" %}

src/content/pages/tag.html

@@ -15,3 +15,4 @@ layout: "base"
             <a href="{{ post.url }}">{{ post.data.title }}</a>
         </li>
     {% endfor %}
+</ul>

src/content/posts/hello_world_again.md

@@ -0,0 +1,9 @@
+---
+title: Hello world again
+date: 2017-02-01
+categories:
+- test
+- email
+---
+
+This is a test post.