[tox]
envlist = py33, py34, py35

[testenv]
deps = pytest
setenv =
    PYTHONHASHSEED = 0
commands = py.test []

[tox]
envlist = py33, py34, py35, py36

[testenv]
deps = pytest
setenv =
    PYTHONHASHSEED = 0
commands = py.test []

Add support for Python 3.6
Add support for Python 3.6

Actually it was already supported, as nothing in steamfiles breaks
between 3.5 and 3.6; now tests include Python 3.6 too.
