Add pypi classifiers.

Author: Robert Buck

setup.py

@@ -22,4 +22,19 @@
     license='BSD License',
     long_description=open(readme).read(),
     install_requires=['pytz>=2015.4'],
+    classifiers=[
+        'Development Status :: 5 - Production/Stable',
+        'Environment :: Console',
+        'Intended Audience :: Developers',
+        'License :: OSI Approved :: BSD License'
+        'Operating System :: MacOS :: MacOS X',
+        'Operating System :: POSIX :: Linux',
+        'Programming Language :: Python',
+        'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: SQL',
+        'Topic :: Database :: Front-Ends',
+    ],
 )