add some more classifiers for pypi

setup.py

@@ -13,6 +13,7 @@
 
 CLASSIFIERS = filter(None, map(str.strip,
 """
+Development Status :: 5 - Production/Stable
 Intended Audience :: Developers
 License :: OSI Approved :: MIT License
 Programming Language :: Python
@@ -16,6 +17,14 @@
 Intended Audience :: Developers
 License :: OSI Approved :: MIT License
 Programming Language :: Python
+Programming Language :: Python :: 2
+Programming Language :: Python :: 2.5
+Programming Language :: Python :: 2.6
+Programming Language :: Python :: 2.7
+Programming Language :: Python :: 3
+Programming Language :: Python :: 3.3
+Programming Language :: Python :: Implementation :: CPython
+Programming Language :: Python :: Implementation :: PyPy
 Topic :: Software Development :: Libraries :: Python Modules
 """.splitlines()))