Initial commit with current state + bundled

_includes/next_song.html

@@ -0,0 +1,14 @@
+  {% for post in site.categories.music %}
+        {% if post.url == page.url %}
+            {% assign post_index0 = forloop.index0 %}
+            {% assign post_index1 = forloop.index %}
+        {% endif %}
+    {% endfor %}
+    {% for post in site.categories.music %}
+        {% if post_index0 == forloop.index %}
+            {% assign next_post = post.url %}
+        {% endif %}
+        {% if post_index1 == forloop.index0 %}
+            {% assign prev_post = post.url %}
+        {% endif %}
+    {% endfor %}