Add RedirectSupportMixin
Add RedirectSupportMixin

Use this mixin with form views, so that after successful form
submission, the user is redirected to whatever GET['next'] is set to, if
it is not missing.

pbanaszkiewicz/amy,swcarpentry/amy,swcarpentry/amy,pbanaszkiewicz/amy,pbanaszkiewicz/amy,swcarpentry/amy,vahtras/amy,vahtras/amy,vahtras/amy