[pkg] Configure "universal" wheel build
According to https://packaging.python.org/distributing/#wheels,
we should create universal wheels (no 2to3 step, no C extension).
Configure this in setup.cfg.
[ci skip]
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/python-cubicweb-documentation/html/index.html
Files: /usr/share/doc/python-cubicweb-documentation/html/*