Fix possible double import of cubes modules When cubes using the new layout are imported with 'cubicweb_<cube>' and with 'cubes.<cube>', the same module is imported twice. Handle this by adding 'cubes.<cube>' to sys.modules when importing from 'cubicweb_<cube>'. Move load_module() to a sub class _CubesLoader to share informations computed in find_modules(). Don't handle subpackages in _CubesImporter and rely on normal import machinery instead. Add a test and use unittest from cubicweb.devtools.testlib which resolve to unittest2 on PY2 with assertLogs() method.

.. -*- coding: utf-8 -*-

.. _Part4:

----------
Appendixes
----------

The following chapters are reference material.

.. toctree::
   :maxdepth: 1
   :numbered:

   faq
   rql/index
   mercurial
   depends
   docstrings-conventions