setup.py: update python version declarations

* remove Python 2.6, just because
* add 3.4, 3.5, 3.6

Signed-off-by: Yves Bastide <yves@botify.com>

Author: ybastide

setup.py

@@ -113,10 +113,12 @@ def read(fname):
         'License :: OSI Approved :: MIT License',
         'Natural Language :: English',
         "Programming Language :: Python :: 2",
-        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
     ],
     test_suite='tests',
     tests_require=[