Update package metadata

Changed development status to beta, since the package is probably feature complete now

Author: ms7s

setup.py

@@ -15,9 +15,13 @@
     classifiers=[
         'Programming Language :: Python',
         'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
         'Operating System :: OS Independent',
         'License :: OSI Approved :: Apache Software License',
-        'Development Status :: 2 - Pre-Alpha',
+        'Development Status :: 4 - Beta',
         'Intended Audience :: Developers',
         'Topic :: Software Development :: Libraries :: Python Modules'
     ]