[doc] Do not rely on lgc's sphinx_ext
This module is broken (getting an ImportError) and I don't want to fix
it. The only usage we make of it is for the "autodocstring" directive,
and I don't know what it does.
Based on the context, replacing autodocstring with either automodule or
autoclass and removing sphinx_ext from required Sphinx extensions.
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/*