Added generic trove classifiers for Python 2.x and 3.x.

Thanks to @brettcannon for the suggestion.

Author: jezdez

setup.py

@@ -130,8 +130,10 @@ def find_package_data(where='.', package='',
         'License :: OSI Approved :: MIT License',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
+        'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.2',
         'Programming Language :: Python :: 3.3',
         'Topic :: Internet :: WWW/HTTP',