Add more Python version classifiers

Author: SethMichaelLarson

setup.py

@@ -54,6 +54,9 @@ def load_version(filename='./virtualbox/version.py'):
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.2',
         'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: Implementation :: CPython',
         'Topic :: Security',
         'Topic :: Scientific/Engineering :: Visualization',