[book] Some tweaks to fix cubicweb-documentation package generation
- Fix up PYTHONPATH setting to make sure sphinx can find cubicweb modules
- Add a few missing build-dependencies
Schema of the data
------------------
First take a look at the data schema_ then try to remember that you are browsing
through a heap of data by applying stylesheets to the results of queries. This
site is not a content management system with items placed in folders. It is an
interface to a database which applies a view to retreived data.
.. _schema: schema