Add notes on pep8 and pyflakes

Change-Id: I8223269d7d56a0e3bffd2f0820d8fee706d418f0

tox.ini

@@ -1,34 +1,36 @@
+# The official style guide for Gertty is this: 
+#
+#   Try to match the existing code style and don't worry about it
+#   too much.
+#
+# Please don't submit changes to enable pep8 style checks or change
+# the code to match pep8 guidelines.  Gertty should be fun to work on
+# and it shouldn't be hard to go with the flow and not worry too much
+# about whitespace.
+#
+# Pyflakes on the other hand is a useful system that often catches
+# real bugs and errors.  Flake8 is used to invoke pyflakes because it
+# supports the "NOQA" flag.
+
 [tox]
 minversion = 1.6
 skipsdist = True
-envlist = pep8, py27
+envlist = pyflakes
 
 [testenv]
-# Set STATSD env variables so that statsd code paths are tested.
 setenv = VIRTUAL_ENV={envdir}
 usedevelop = True
 install_command = pip install {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
 
-[tox:jenkins]
+[testenv:pyflakes]
-downloadcache = ~/cache/pip
-
-[testenv:pep8]
 commands = flake8
 deps = flake8
 
-[testenv:cover]
-commands =
-  python setup.py testr --coverage
-
-[testenv:docs]
-commands = python setup.py build_sphinx
-
 [testenv:venv]
 commands = {posargs}
 
 [flake8]
-ignore = E122,E123,E126,E127,E128,E129,E221,E225,E226,E231,E251,E261,E262,E265,E301,E302,E303,E711,E712,E721,F401,F403,F821,F841,W391
+ignore = W,E,F401,F403,F821,F841
 show-source = True
 exclude = .venv,.tox,dist,doc,build,*.egg
-max-line-length = 172