Merge pull request #220 from goya191/master

fix issue 217 by adding contrib to setup.py file

setup.py

@@ -17,7 +17,7 @@ setup(
     version='9.0.5',
     author='Nick Ficano',
     author_email='[email protected]',
-    packages=['pytube'],
+    packages=['pytube', 'pytube.contrib'],
     url='https://github.com/nficano/pytube',
     license=license,
     entry_points={