Added Python 3.3 to tox and travis conf.

.travis.yml

@@ -3,7 +3,7 @@ python:
   - 2.6
   - 2.7
   - pypy
-  - 3.2
+  - 3.3
 script: python setup.py test
 install:
   - pip install . --use-mirrors

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py26, py27, py32, pypy
+envlist = py26, py27, py33, pypy
 
 [testenv]
 commands = {envpython} setup.py test