Update pypi.python.org URL to pypi.org
For details on the new PyPI, see the blog post:
@@ -4,7 +4,7 @@ django-storages
.. image:: https://img.shields.io/pypi/v/django-storages.svg
- :target: https://pypi.python.org/pypi/django-storages
+ :target: https://pypi.org/project/django-storages/
:alt: PyPI Version
.. image:: https://travis-ci.org/jschneier/django-storages.svg?branch=master
