add the py3.3 keyword back

Author: tomato42

setup.py

@@ -35,6 +35,7 @@
             'Programming Language :: Python :: 2.6',
             'Programming Language :: Python :: 2.7',
             "Programming Language :: Python :: 3",
+            'Programming Language :: Python :: 3.3',
             'Programming Language :: Python :: 3.4',
             'Programming Language :: Python :: 3.5',
             'Programming Language :: Python :: 3.6',