[setuptools] Automaticly move data content of a cubicweb's egg in the proper location.
This should be done once during the first import of the cubicweb module.
This is an ugly hack because setuptools lake proper post install hooks.
Document: cubicweb-doc
Title: CubicWeb documentation
Author: Logilab
Abstract: Some base documentation for CubicWeb users and developpers
Section: Apps/Programming
Format: HTML
Index: /usr/share/doc/cubicweb-documentation/index.html
Files: /usr/share/doc/cubicweb-documentation/*.html