Update classifiers

Author: francozappa

setup.py

@@ -20,9 +20,19 @@
     author_email='[email protected]',
     license='MIT',
     classifiers=[
+        'Development Status :: 5 - Production/Stable',
+        'Environment :: Console',
+        'Intended Audience :: Developers',
+        'Intended Audience :: Education',
+        'Intended Audience :: End Users/Desktop',
+        'Natural Language :: English',
+        'Operating System :: POSIX :: Linux',
         'License :: OSI Approved :: MIT License',
         'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',
+        'Topic :: Education',
+        'Topic :: Scientific/Engineering :: Information Analysis',
+        'Topic :: Security',
     ],
     keywords='simulation cyber-physical systems security real-time mininet',
     packages=['minicps'],