a CVS for releases?

would be cool to have a CVS, so if someone update an attachment, the old one is stored in backup, and only the new one is shown. also if someone delete an attachment, it is stored in the same backup and the file seems deleted…

i suppose it’s not complicated to do… this would be just awesome for releases… and to avoid the crisis we see on vb.org all the time about deleted and graveyard…