Breaking docs up into smaller pieces

docs/patterns/index.rst

@@ -0,0 +1,20 @@
+.. _patterns:
+
+Patterns for Flask
+==================
+
+Certain things are common enough that the changes are high you will find
+them in most web applications.  For example quite a lot of applications
+are using relational databases and user authentication.  In that case,
+changes are they will open a database connection at the beginning of the
+request and get the information of the currently logged in user.  At the
+end of the request, the database connection is closed again.
+
+.. toctree::
+   :maxdepth: 2
+
+   packages
+   sqlite3
+   sqlalchemy
+   templateinheritance
+   flashing