README usage nit

[sarnold]

First, thanks! for this plugin that saves one of my favorite dev workflows (you can see the current example here).

The "nit" I have is the vendored usage requires setting PYTHONPATH=. which wasn't clear at first. As shown above ^^ it works perfectly, so thanks again.

[masenf]

It should be on pypi, did you try adding the plug-in to [tox] section like

requires =
    tox-ignore-env-name-mismatch ~= 0.2.0

[masenf]

If you're just talking about the vendored install method, then it almost sounds like a tox bug, where tox cannot find the toxfile.py adjacent to the tox.ini