Add dependencies to setup.py
Add dependencies to setup.py

I just picked the versions that I currently know to work as minimum versions,
with one exception: we know that we are currently not compatible with Django
1.9 or greater, so I explicitly exclude that.

jrief/django-shop,divio/django-shop,nimbis/django-shop,nimbis/django-shop,awesto/django-shop,rfleschenberg/django-shop,khchine5/django-shop,rfleschenberg/django-shop,awesto/django-shop,nimbis/django-shop,jrief/django-shop,jrief/django-shop,khchine5/django-shop,khchine5/django-shop,rfleschenberg/django-shop,awesto/django-shop,nimbis/django-shop,divio/django-shop,rfleschenberg/django-shop,khchine5/django-shop,jrief/django-shop,divio/django-shop