pytest-2.6.3: some fixes

pytest-2.6.3: fixes and little improvements === pytest is a mature Python testing tool with more than a 1100 tests against itself, passing on many different interpreters and platforms. This release is drop-in compatible to 2.5

tox-1.8: parametrized/generative environments

tox 1.8: Generative/combinatorial environments specs = I am happy to announce tox 1.8 which implements parametrized environments and should otherwise be fully backward compatible to tox-1.7.2. See https://tox.testrun.org