Add docs for new batch system.

And some other tweak(s).

docs/index.rst

@@ -5,17 +5,32 @@ Tailbone
 Welcome to Tailbone, part of the Rattail project.
 
 The documentation you are currently reading is for the Tailbone web application
-package. More information is (sort of) available at http://rattailproject.org/.
+package.  Some additional information is available on the `website`_.  Clearly
+not everything is documented yet.  Below you can see what has received some
+attention thus far.
 
-Clearly not everything is documented yet.  Below you can see what has received
-some attention thus far.
+.. _website: https://rattailproject.org/
 
-API:
+Narrative Documentation:
 
 .. toctree::
-   :maxdepth: 2
+
+   narr/batches
+
+Package API:
+
+.. toctree::
+   :maxdepth: 1
 
    api/subscribers
+   api/views/batch
+   api/views/vendors.catalogs
+
+
+Documentation To-Do
+===================
+
+.. todolist::
 
 
 Indices and tables