Feature Request: delete_selected explicit option in admin

Hi, according to this topic the only way to let the admin call delete() on every model using the delete_selected admin action is to copy the function, delete the queryset.delete()-method, add a obj.

Re: Query on BooleanField with values other than True and False, bug or intentional?

I agree on the "it is the job of the user" thing as well as on the predictability on IntegerField, but there is at least one case where this goes horribly wrong. Imagine in the web-world we are receiving JSON and for some case, the browser sends "false" as a string. `bool('false') -> True`. One