update setup.py
update setup.py

fix install pip -6.0.6
theskumar/django-versatileimagefield,WGBH/django-versatileimagefield,theskumar/django-versatileimagefield,respondcreate/django-versatileimagefield,WGBH/django-versatileimagefield,WGBH/django-versatileimagefield,respondcreate/django-versatileimagefield,theskumar/django-versatileimagefield,respondcreate/django-versatileimagefield