Fixed #3334 -- added Python 3.6 support (#3335)

* Fixed #3334 -- added Python 3.6 support

* install py36

* empty commit to retrigger travis

* this is an impressively dumb typo
diff --git a/tox.ini b/tox.ini
index e29b2d5..0e75011 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.4
-envlist = py26,py27,pypy,py33,py34,py35,docs,pep8,py3pep8
+envlist = py26,py27,pypy,py33,py34,py35,py36,docs,pep8,py3pep8
 
 [testenv]
 extras =