fix tox tests

tox.ini

 [tox]
 envlist = py27,py34
+
+[testenv]
+deps=
+    unittest2
+    mock
+    responses
+
+commands=unit2 discover []
+
+#[testenv:py27]
+#commands=
+#    unit2 discover []
+#    sphinx-build -b doctest docs html
+#    sphinx-build docs html
+#deps =
+#    unittest2
+#    sphinx