Added PyPI badge to README
Added PyPI badge to README

rodgomes/django-waffle,rsalmaso/django-waffle,rsalmaso/django-waffle,willkg/django-waffle,rodgomes/django-waffle,rodgomes/django-waffle,rsalmaso/django-waffle,rsalmaso/django-waffle,willkg/django-waffle,rodgomes/django-waffle