Update contributor documentation according to reviews feedback
@@ -56,6 +56,8 @@ Guidelines for Contributing to github3.py
#. Please follow pep-0008_. Feel free to also use flake8_ to help.
+#. Import modules, not class or functions
+
.. links
.. _README: ./README.rst
.. _easy: https://github.com/sigmavirus24/github3.py/issues?labels=Easy&page=1&state=open
