Test with python 3.3 as well

Have to start making them compatible at some point.

Author: Byron

.travis.yml

@@ -2,6 +2,7 @@ language: python
 python:
   - "2.6"
   - "2.7"
+  - "3.3"
   # - "pypy" - won't work as smmap doesn't work (see smmap/.travis.yml for details)
 
 script: nosetests