Add to list of supported Python 3.x versions

Author: cmcqueen

setup.py

@@ -48,6 +48,10 @@
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.1',
         'Programming Language :: Python :: 3.2',
+        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
         'Topic :: Communications',
     ],
 )