Update post and footer layout

blog.html

@@ -0,0 +1,19 @@
+---
+title: "Journal"
+layout: default
+---
+
+<h1>Journal</h1>
+
+{% assign posts_by_month = site.posts | group_by_exp: "post", "post.date | date: '%B %Y'" %}
+{% for month in posts_by_month %}
+  <h2>{{ month.name }}</h2>
+  <ul>
+    {% for post in month.items %}
+      <li>
+        <time>{{ post.date | date: "%Y.%m.%d" }}</time>
+        <a href="{{ post.url }}">{{ post.title }}</a>
+      </li>
+    {% endfor %}
+  </ul>
+{% endfor %}