Add clasifiers for the Python implementations and versions

setup.py

@@ -58,4 +58,15 @@ setup(
 
     zip_safe=False,
     cmdclass={"test": PyTest},
+
+    classifiers=[
+        "Programming Language :: Python :: Implementation :: CPython",
+        "Programming Language :: Python :: Implementation :: PyPy",
+        "Programming Language :: Python :: 2",
+        "Programming Language :: Python :: 2.6",
+        "Programming Language :: Python :: 2.7",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.2",
+        "Programming Language :: Python :: 3.3",
+    ]
 )