Add classifiers to setup.py

So that it can benefit tools like
https://github.com/brettcannon/caniusepython3

Author: Bruno Alla

setup.py

@@ -10,5 +10,24 @@
     author_email='[email protected]',
     url='https://github.com/gizmag/django-fsm-log',
     packages=find_packages(),
-    install_requires=['django>=1.6', 'django_fsm>=2', 'django_appconf']
+    install_requires=['django>=1.6', 'django_fsm>=2', 'django_appconf'],
+    classifiers=[
+        'Development Status :: 5 - Production/Stable',
+        'Environment :: Web Environment',
+        'Framework :: Django',
+        'Framework :: Django :: 1.6',
+        'Framework :: Django :: 1.7',
+        'Framework :: Django :: 1.8',
+        'Intended Audience :: Developers',
+        'License :: OSI Approved :: MIT License',
+        'Operating System :: OS Independent',
+        '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',
+        'Programming Language :: Python :: 3.5',
+        'Topic :: Software Development :: Libraries :: Python Modules',
+    ]
 )