Rename _includes to _partials

source/_partials/posts/latest.html.twig

@@ -0,0 +1,15 @@
+{% if data.posts and page.url != '/blog' %}
+    <div class="widget lh-copy">
+        <h2>Latest Blog Posts</h2>
+
+        <ul class="bullets">
+            {% for post in data.posts|slice(0, site.latest_posts) %}
+                <li>
+                    <a href="{{ post.url }}">
+                        {{ post.title }}
+                    </a>
+                </li>
+            {% endfor %}
+        </ul>
+    </div>
+{% endif %}