Try invoking ez_setup.py to ensure it works at a basic level

--HG--
extra : amend_source : 7cb5d6115f9933afd90e5d96a53af9c3ada79b80

.travis.yml

@@ -6,4 +6,6 @@ python:
   - 3.3
   - pypy
 # command to run tests
-script: python setup.py test
+script:
+ - python setup.py test
+ - python ez_setup.py --user