Switch form pycodestyle to flake8

Author: codingjoe

setup.cfg

@@ -28,10 +28,8 @@ addopts = --tb=short -rxs
 DJANGO_SETTINGS_MODULE=tests.testapp.settings
 norecursedirs = env docs .eggs
 
-[pycodestyle]
+[flake8]
 max-line-length = 99
-statistics = true
-show-source = true
 exclude = */migrations/*,docs/*,env/*,.tox/*
 
 [pydocstyle]