You caught us doing some quick maintenance, temporarily restricting your repository to read-only access.
Issue #364 on hold
it would be useful to be able to share/reuse config (for example, a style toxenv) through some sort of include syntax in tox.ini.
e.g. in tox.ini:
[tox] envlist = py27,py35,style include = tox-style.ini
That's almost definitely not the right syntax to use, but I think it gets the idea.