Largely inspired from django-floppyforms. Designed to not depend on OpenLayers at code level.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@10634 bcc190cf-cafb-0310-a4f2-bffc1f526a37
git-svn-id: http://code.djangoproject.com/svn/django/trunk@8219 bcc190cf-cafb-0310-a4f2-bffc1f526a37