Add modules to list and to index to have docstring integrated into the documentation.
Needs to be completed. Sphinx required to explicitely list which modules we want to include in the documentation.
usr/lib/python2.4/site-packages/cubicweb
usr/lib/python2.4/site-packages/cubicweb/common
usr/share/cubicweb/cubes/shared
usr/share/doc/cubicweb-common