Enforce flake8 before build
pip install flake8
Merge branch 'master' into flake8
Precheck pyflakes instead of flake8
flake8 fixes and check on Travis
flake8 fix for Py3
Add pypy3; don't allow 3.4 to fail
  fast_finish: true
Merge pull request #7 from hugovk/flake8

Flake8