add python 3.3 classifier

Author: dhellmann

setup.py

@@ -188,6 +188,7 @@ def find_package_data(where='.',
                  'Programming Language :: Python :: 2.7',
                  'Programming Language :: Python :: 3',
                  'Programming Language :: Python :: 3.2',
+                 'Programming Language :: Python :: 3.3',
                  'Intended Audience :: Developers',
                  'Environment :: Console',
                  ],