Use different template for section

This is useful for pages that are not articles, such as 'about'.
Creating a new section with only '_index.md' creates a new plain page.

content/about/_index.md

@@ -0,0 +1,5 @@
++++
+title = "About"
+template = "section.html"
++++
+

templates/section.html

@@ -0,0 +1,10 @@
+{% extends "index.html" %}
+
+{% block title %}
+	{{ section.title }} – {{ config.title }}
+{% endblock title %}
+
+{% block content %}
+	<h1>{{ section.title | safe }}</h1>
+	{{ section.content | safe }}
+{% endblock content %}