Add the install section back (I suspect it may be required to indicate a Python project).

--HG--
branch : distribute
extra : rebase_source : 1741ce7955e97e5f4837bcf9d64df56ac4bb4e78

travis.yml

@@ -3,5 +3,7 @@ python:
   - 2.6
   - 2.7
   - 3.2
+# install
+install: python --version
 # command to run tests
 script: python setup.py test