Add python language version classifiers

setup.py

@@ -36,6 +36,8 @@ setup(
         'License :: OSI Approved :: BSD License',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
+        'Programming Language :: Python :: 2.6',
+        'Programming Language :: Python :: 2.7',
         'Topic :: Software Development :: Libraries :: Python Modules',
         'Natural Language :: English',
         ],