add titleless posts and a menu in the footer

_includes/menu.html

@@ -0,0 +1,21 @@
+{% assign menu = site.data.menu %}
+
+{% if menu %}
+  <nav class="site-navigation">
+    <ul>
+    {% for item in site.data.menu %}
+      <li>
+        {% if item.url contains 'http' %}
+          <a href="{{ item.url }}">
+            {{ item.title }}
+          </a>
+        {% else %}
+          <a href="{{ item.url | prepend: site.baseurl }}">
+            {{ item.title }}
+          </a>
+        {% endif %}
+      </li>
+    {% endfor %}
+    </ul>
+  </nav>
+{% endif %}

_includes/post-list-item.html

@@ -0,0 +1,26 @@
+{% capture excerpt %}
+  {{ post.excerpt | replace: "<p>", "" | replace: "</p>", "" }}
+{% endcapture %}
+
+{% assign excerpt_length = excerpt | size %}
+
+<li>
+  <a href="{{ post.url | absolute_url }}" class="post-link">
+    {% unless post.title == "" %}
+      <span class="post-title">
+        {{ post.title }}
+      </span>
+    {% else %}
+      <span class="post-title">
+        {% if excerpt_length > 140 %}
+          {{ excerpt | truncatewords: 12, '…' }}
+        {% else %}
+          {{ excerpt }}
+        {% endif %}
+      </span>
+    {% endunless %}
+    <span class="post-date">
+      {{ post.date | date: "%b %-d, '%y" }}
+    </span>
+  </a>
+</li>