Fix TROVE classifiers

Author: asvetlov

setup.py

@@ -33,6 +33,7 @@ def read(f):
           'License :: OSI Approved :: BSD License',
           'Intended Audience :: Developers',
           'Programming Language :: Python',
+          'Programming Language :: Python :: 3',
           'Programming Language :: Python :: 3.3',
           'Programming Language :: Python :: 3.4',
           'Topic :: Internet :: WWW/HTTP'],