remove python 3.3 support

Author: willforde

setup.py

@@ -35,7 +35,6 @@ def version(name):
                    'Programming Language :: Python :: 2',
                    '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',