Loosen Django requirement
Loosen Django requirement

So that each project may control which version of Django to use. Not all
of the latest requirements are compatible with Django 1.4 anymore.

pyohio/symposion,faulteh/symposion,toulibre/symposion,pyohio/symposion,faulteh/symposion,toulibre/symposion,pyconau2017/symposion,pydata/symposion,miurahr/symposion,pydata/symposion,euroscipy/symposion,euroscipy/symposion,miurahr/symposion,pyconau2017/symposion,pinax/symposion,pinax/symposion