Reworked docs rendering using jinja2.

data/templates/xap/docs/docs.md.j2

@@ -0,0 +1,7 @@
+{%- for item in xap.documentation.order -%}
+{%- if not item[0:1] == '!' -%}
+{{ xap.documentation.get(item) }}
+{% else %}
+{%- include item[1:] %}
+{% endif %}
+{% endfor %}