Add Python 3.4 to list of versions to test on travis.
Add Python 3.4 to list of versions to test on travis.

Python 3.2 is therefore abandoned.

mygola/python-oauth2,wndhydrnt/python-oauth2,candango/python-oauth2,mygola/python-oauth2,CoolCloud/python-oauth2,mygola/python-oauth2,candango/python-oauth2,CoolCloud/python-oauth2,gcd0318/python-oauth2,wndhydrnt/python-oauth2,CoolCloud/python-oauth2,gcd0318/python-oauth2,wndhydrnt/python-oauth2,candango/python-oauth2,gcd0318/python-oauth2