Move addressfield data into its own app

addressfield/__init__.py

addressfield/models.py

addressfield/static/address_form.js

addressfield/static/addressfield.min.json

addressfield/static/jquery.addressfield.min.js

...eld/templates/addressfield/widgets/nested_with_label.html

addressfield/widgets.py

opentech/apply/funds/blocks.py

opentech/settings/base.py