Updated CW tutorial.
* Summarized the list of steps to create a new cube.
* Added a subsection on writing entities.
* Added a subsection on modifying the schema and updating the corresponding instance.
.. -*- coding: utf-8 -*-
Server Architecture
-------------------
.. image:: images/server-class-diagram.png
`Diagramme ArgoUML`_
[FIXME]
Make a downloadable source of zargo file.
.. _`Diagramme ArgoUML`: cubicweb.zargo