Restructured documentation a bit.

docs/index.rst

@@ -14,6 +14,24 @@ you rather want to dive into all the internal parts of Flask, check out
 the :ref:`api` documentation.  Common patterns are described in the
 :ref:`patterns` section.
 
+Flask also depends on two external libraries: the `Jinja2`_ template
+engine and the `Werkzeug`_ WSGI toolkit.  both of which are not documented
+here.  If you want to dive into their documentation check out the
+following links:
+
+-   `Jinja2 Documentation <http://jinja.pocoo.org/2/documentation/>`_
+-   `Werkzeug Documentation <http://werkzeug.pocoo.org/documentation/>`_
+
+.. _Jinja2: http://jinja.pocoo.org/2/
+.. _Werkzeug: http://werkzeug.pocoo.org/
+
+Textual Documentation
+---------------------
+
+This part of the documentation is written text and should give you an idea
+how to work with Flask.  It's a series of step-by-step instructions for
+web development.
+
 .. toctree::
    :maxdepth: 2
 
@@ -21,8 +39,18 @@ the :ref:`api` documentation.  Common patterns are described in the
    installation
    quickstart
    tutorial
-   patterns
-   api
-   deploying
    testing
+   patterns
+   deploying
    becomingbig
+
+Reference
+---------
+
+If you are looking for information on a specific function, class or
+method, this part of the documentation is for you:
+
+.. toctree::
+   :maxdepth: 2
+
+   api