Add some about extending the schema, first alembic version

plus some more structure for web/mainapp

docs/web/index.rst

@@ -8,6 +8,6 @@ Web Layer
    :caption: Contents:
 
    overview
-   webmain
+   mainapp/index
    webapi
    spa

docs/web/mainapp/index.rst

@@ -0,0 +1,12 @@
+
+Default Web App
+===============
+
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
+   overview
+   patterns
+   tasks/index

docs/web/mainapp/overview.rst

@@ -0,0 +1,5 @@
+
+Overview
+========
+
+TODO

docs/web/mainapp/patterns.rst

@@ -0,0 +1,6 @@
+
+=================
+ Common Patterns
+=================
+
+TODO

docs/web/mainapp/tasks/index.rst

@@ -0,0 +1,10 @@
+
+Common Tasks
+============
+
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
+   newmasterview

docs/web/mainapp/tasks/newmasterview.rst

@@ -0,0 +1,12 @@
+
+===============
+New Master View
+===============
+
+This assumes you already have a table in your (or another) DB and wish to
+expose basic CRUD things for it, a la typical master view style.
+
+If you want to use a custom table you created, you must do that part first.
+See also :doc:`/data/db/extend`.
+
+TODO: how exactly to do it, without copy/pasta

docs/web/webmain.rst

@@ -1,17 +0,0 @@
-
-Default Web App
-===============
-
-TODO
-
-
-Common Tasks
-------------
-
-TODO
-
-
-Common Patterns
----------------
-
-TODO