[pyramid] Do not issue security warnings in test mode
When some session or authtk secret is missing in Pyramid settings,
scary "!! SECURITY WARNING !!" are issued. This is arguably pointless in
tests. So disable them in this case.
The facets system
-----------------
Facets allow to restrict searches according to some user friendly criterias.
CubicWeb has a builtin `facet`_ system to define restrictions `filters`_ really
as easily as possible.
Here is an exemple of the facets rendering picked from our
http://www.cubicweb.org web site:
.. image:: ../../images/facet_overview.png
Facets will appear on each page presenting more than one entity that may be
filtered according to some known criteria.
Base classes for facets
~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: cubicweb.web.facet
.. _facet: http://en.wikipedia.org/wiki/Faceted_browser
.. _filters: http://www.cubicweb.org/blogentry/154152