Added some more classifiers to setup.py

Author: intjelic

setup.py

@@ -142,9 +142,12 @@ def cython_sources(self, sources, extension):
                         'Intended Audience :: Developers',
                         'License :: OSI Approved :: zlib/libpng License',
                         'Operating System :: OS Independent',
+                        'Programming Language :: Python :: 2',
+                        'Programming Language :: Python :: 3',
                         'Programming Language :: Cython',
                         'Programming Language :: C++',
                         'Programming Language :: Python',
+                        'Programming Language :: Python :: Implementation :: CPython',
                         'Topic :: Games/Entertainment',
                         'Topic :: Multimedia',
                         'Topic :: Software Development :: Libraries :: Python Modules'],