Update tox.ini to test on up-to-date python and django versions
Update tox.ini to test on up-to-date python and django versions

Python 3.4 and 2.7
Django 1.8 and 1.9

intellisense/django-loginas,jarcoal/django-loginas,skorokithakis/django-loginas,stochastic-technologies/django-loginas,intellisense/django-loginas,jarcoal/django-loginas,skorokithakis/django-loginas,stochastic-technologies/django-loginas