force pytest-pep8 to ignore the pep8 warnings that

pizzathief · pizzathief · commit 784fdf8dadbf · 2016-01-21T12:09:03.000+11:00
matplotlib has already specified.  Which might make
the output log shorter than 4 megs.
diff --git a/tox.ini b/tox.ini
@@ -19,6 +19,7 @@ deps =
 [pytest]
 norecursedirs = .git build
 testpaths = tests
+pep8ignore = E111 E114 E115 E116 E121 E122 E123 E124 E125 E126 E127 E128 E129 E131 E265 E266 W503
 
 [pep8]
 ignore=E111,E114,E115,E116,E121,E122,E123,E124,E125,E126,E127,E128,E129,E131,E265,E266,W503
