Add initial site config, content and copy of "simple" theme.

themes/next.copyleft.org/templates/authors.html

@@ -0,0 +1,12 @@
+{% extends "base.html" %}
+
+{% block title %}{{ SITENAME }} - Authors{% endblock %}
+
+{% block content %}
+    <h1>Authors on {{ SITENAME }}</h1>
+    <ul>
+    {% for author, articles in authors|sort %}
+        <li><a href="{{ SITEURL }}/{{ author.url }}">{{ author }}</a> ({{ articles|count }})</li>
+    {% endfor %}
+    </ul>
+{% endblock %}