stub out route and broadcast_message docs

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

@@ -0,0 +1,4 @@
+{%- for id, message in xap.broadcast_messages.messages | dictsort %}
+### {{ message.name }} - `{{ id }}`
+{{ message.description }}
+{%- endfor %}

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

@@ -0,0 +1,12 @@
+{%- for id, route in xap.routes | dictsort %}
+### {{ route.name }} - `{{ id }}`
+{{ route.description }}
+
+{% if route.routes %}
+| Name | Route | Definition |
+| -- | -- | -- |
+{%- for subid, subroute in route.routes | dictsort %}
+| {{ subroute.name }} | `{{ id }} {{ subid }}` | {{ subroute.description.split('\n')[0] }} |
+{%- endfor %}
+{% endif %}
+{%- endfor %}