Better classifiers in setup.py

Author: thegrymek

setup.py

@@ -26,10 +26,10 @@ def url(*args):
     keywords=['pickle', 'cache', 'collections', 'list', 'json', 'zlib'],
     classifiers=[
         'Operating System :: OS Independent',
-        'Programming Language :: Python 2.7',
-        'Programming Language :: Python 3.4',
-        'Programming Language :: Python 3.5',
-        'Programming Language :: Python 3.6',
+        'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
         'Topic :: Software Development :: Libraries :: Python Modules',
     ],
 )