Update classifiers in setup.py

This removes 2.5, 3.0, 3.1, and 3.2 while adding 3.5.

We don't want to actively support 2.5, 3.0, 3.1, or 3.2 and don't
want to receive bug reports for those versions.

Author: sigmavirus24

setup.py

@@ -43,13 +43,10 @@
         'Intended Audience :: Developers',
         'Natural Language :: English',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2.5',
         'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3.0',
-        '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',
     ),
 )