Remove python 3.3, add python 3.5 and 3.6
Remove python 3.3, add python 3.5 and 3.6

Python 3.3 has reached end of life: https://www.python.org/downloads/release/python-336/
arthurian/python-oauth2,squirro/python-oauth2,joestump/python-oauth2,simplegeo/python-oauth2