add python 3.4 tox environments to travis for builds
add python 3.4 tox environments to travis for builds

pombredanne/django-configurations,jezdez/django-configurations,seenureddy/django-configurations,jazzband/django-configurations,NextHub/django-configurations,gatherhealth/django-configurations,incuna/django-configurations,nangia/django-configurations,jazzband/django-configurations,cato-/django-configurations,blindroot/django-configurations