Fixed #12202 -- Removed hardcoded password reset subject and added a subject_template_name parameter to the password_reset view. Thanks, Ramiro Morales, Claude Paroz and agabel.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16438 bcc190cf-cafb-0310-a4f2-bffc1f526a37