----
- use virtualenv5 (my own fork of virtualenv3) for now to create python3
environments, fixes a couple of issues and makes tox more likely to
work with Python3 (on non-windows environments)
- add ``sitepackages`` option for testenv sections so that environments
can be created with access to globals (default is not to have access,
i.e. create environments with ``--no-site-packages``.
- addressing `4 <https://github.com/tox-dev/tox/issues/4>`_: always prepend venv-path to PATH variable when calling subprocesses
- fix `2 <https://github.com/tox-dev/tox/issues/2>`_: exit with proper non-zero return code if there were
errors or test failures.
- added unittest2 examples contributed by Michael Foord
- only allow 'True' or 'False' for boolean config values
(lowercase / uppercase is irrelevant)
- recreate virtualenv on changed configurations