Style the password reset process

To get the custom template to properly override the stock templates I
needed to make sure our app is installed before Django registration.
Adam changed the app load order in 69f709eb, but I talked to him and
said it was most likely ok (and more correct) to switch it back.

Fixes #710
Remove default activation templates

These are overridden in the management application so these stale,
unstyled overrides were only causing confusion.
Drop get_field_by_name to fix app in gunicorn

fixes a pre-deployment bug found where the app was working for unknown reasons during tests and with the django runserver but was breaking when run with gunicorn. The problem, in a nutshell, is that get_field_by_name does a full import process that chokes, for unknown reasons, on a downstream app. This whole problem is circumvented by not using get_field_by_name. see comment block for more details.
Merge pull request #733 from steventlamb/bug/fix_gunicorn_builds

Drop get_field_by_name to fix app in gunicorn
Merge pull request #730 from jwalgran/topic/style-password-reset

Style password reset