gbin/err — pull request #141 by tomusher (2013-04-07 19:54:35+00:00)
Title: Add tox.ini for optional use of tox to manage test suite on Py2 and Py3

Added a tox.ini so that it's a bit easier to run the test suite on Py2 and Py3 quickly. Seems to work quite well and should help catch issues now that Err works nicely with both.