Add Python 3.6 (#214)

* Add Python 3.6

Plus the other explicit major.minor versions supported
diff --git a/setup.py b/setup.py
index 2ceb7b8..8d3ee8c 100644
--- a/setup.py
+++ b/setup.py
@@ -48,7 +48,14 @@
     platforms='Cross Platform',
     classifiers = [
         'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 3',],
+        'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.2',
+        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+    ],
     packages=['pycparser', 'pycparser.ply'],
     package_data={'pycparser': ['*.cfg']},
     cmdclass={'install': install, 'sdist': sdist},