[pkg] Use setuptools.find_packages()
We drop the custom get_packages() function in setup.py that used to look
for test files (not discovered automatically since test directories are
not packages) and replace it by explicit entries in MANIFEST.in.
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/*