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

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

@@ -0,0 +1,14 @@
+{% extends "base.html" %}
+
+{% block title %}{{ SITENAME }} - {{ period | reverse | join(' ') }} archives{% endblock %}
+
+{% block content %}
+<h1>Archives for {{ period | reverse | join(' ') }}</h1>
+
+<dl>
+{% for article in dates %}
+    <dt>{{ article.locale_date }}</dt>
+    <dd><a href="{{ SITEURL }}/{{ article.url }}">{{ article.title }}</a></dd>
+{% endfor %}
+</dl>
+{% endblock %}