[tox] Put development dependencies into a dev-requirements.txt file The latter being sourced in tox.ini. For now this contains references to hg repositories for some dependencies but under normal circumstances it should only contain pytest. This is useful when developping cubicweb itself without using tox but working with a virtualenv so that one can simply do: :: $ virtualenv --system-site-packages venv $ . venv/bin/activate $ pip install -r dev-requirements.txt $ python setup.py develop

[py3k] Fix config-level comparison in "cubicweb-ctl create" command dict.get -> None, and None cannot compare to an int in Python 3.

[pkg] PEP8 fixes in __pkginfo__.py