Add tutorials listing page

tutorials/tutorials.md

@@ -0,0 +1,17 @@
+---
+permalink: /tutorials/
+---
+
+## Listing Tutorials
+
+<ul>
+{% assign tutorials = site.pages | where_exp: "p", p.path contains "tutorials/" %}
+{% for t in tutorials %}
+  {% if t.path != "tutorials/index.md" and t.path != "tutorials/README.md" and t.path != "tutorials.md" %}
+    <li>
+      <a href="{{ t.url | relative_url }}">{{ t.title | default: t.path | replace: "tutorials/", "" }}</a>
+      {% if t.date %} — <time datetime="{{ t.date | date_to_xmlschema }}">{{ t.date | date: "%Y-%m-%d" }}</time>{% endif %}
+    </li>
+  {% endif %}
+{% endfor %}
+</ul>