Use latest django releases also in tox.
Use latest django releases also in tox.

akheron/django-modeltranslation,extertioner/django-modeltranslation,vstoykov/django-modeltranslation,deschler/django-modeltranslation,yoza/django-modeltranslation,extertioner/django-modeltranslation,nanuxbe/django-modeltranslation,yoza/django-modeltranslation,marctc/django-modeltranslation,SideStudios/django-modeltranslation,akheron/django-modeltranslation,SideStudios/django-modeltranslation,deschler/django-modeltranslation,marctc/django-modeltranslation,nanuxbe/django-modeltranslation,vstoykov/django-modeltranslation