Updating tox environment to use stable 1.5 release.
Updating tox environment to use stable 1.5 release.

mlavin/django-all-access,mlavin/django-all-access,dpoirier/django-all-access,dpoirier/django-all-access,vyscond/django-all-access,vyscond/django-all-access,iXioN/django-all-access,iXioN/django-all-access