Travis update to try to stop auto-use of Django 1.9
Travis update to try to stop auto-use of Django 1.9

pydanny/dj-stripe,kavdev/dj-stripe,tkwon/dj-stripe,kavdev/dj-stripe,pydanny/dj-stripe,tkwon/dj-stripe,jleclanche/dj-stripe,photocrowd/dj-stripe,dj-stripe/dj-stripe,dj-stripe/dj-stripe,jameshiew/dj-stripe,jleclanche/dj-stripe,jameshiew/dj-stripe,photocrowd/dj-stripe