Adding python 3.6

Signed-off-by: Jason Myers <jason@jasonamyers.com>

Author: jasonamyers

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py26,py33,py34,py35,zsh,ksh,style
+envlist = py27,py26,py33,py34,py35,py36,zsh,ksh,style
 
 [testenv]
 install_command = pip install -U {opts} {packages}
@@ -49,4 +49,4 @@ basepython=python2.7
 deps =
   -r{toxinidir}/requirements.txt
   -r{toxinidir}/docs/requirements.txt
-commands = python setup.py build_sphinx
+commands = python setup.py build_sphinx