Update trove classification to include Python 3.5

Author: stefankoegl

setup.py

@@ -67,6 +67,7 @@
     'Programming Language :: Python :: 3.2',
     'Programming Language :: Python :: 3.3',
     'Programming Language :: Python :: 3.4',
+    'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: Implementation :: CPython',
     'Programming Language :: Python :: Implementation :: PyPy',
     'Topic :: Software Development :: Libraries',