Upgrade tox version and Python versions#411

Merged

borshop merged 3 commits intomasterfrom

feature/bch/upgrade-tox-3.4.3

Sep 18, 2015

Commits on Sep 11, 2015

Upgrade tox version and Python versions
vagrant
committed
Update from pyflakes to flake8 to lint test under Python 3

Brett Hazen
authored and
vagrant
committed

Commits on Sep 14, 2015

Install each version of Pyenv and Python independently for buildbot
Brett Hazen
committed