Fix trove classifiers

Author: RazerM

setup.py

@@ -40,10 +40,10 @@
         'Operating System :: POSIX :: Linux',
         'Operating System :: MacOS :: MacOS X',
         'Operating System :: Microsoft :: Windows',
-        'Programming Language :: Python :: 2 :: 2.7',
-        'Programming Language :: Python :: 3 :: 3.4',
-        'Programming Language :: Python :: 3 :: 3.5',
-        'Programming Language :: Python :: 3 :: 3.6',
+        'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
     ],