Fixed #12525. Added a note to the validators doucmentation that models will not automatically run validators when saved, and a link to the ModelForm docs.
Fixed #12525. Added a note to the validators doucmentation that models will not automatically run validators when saved, and a link to the ModelForm docs.

git-svn-id: 4f9f921b081c523744c7bf24d959a0db39629563@12212 bcc190cf-cafb-0310-a4f2-bffc1f526a37

FlaPer87/django-nonrel,FlaPer87/django-nonrel,aparo/django-nonrel,aparo/django-nonrel,FlaPer87/django-nonrel,aparo/django-nonrel