http://www.literatureandlatte.com/scrivener.php http://www.literatureandlatte.com/scrivener.php Scrivener comes closer than anything else I've seen to meeting

http://www.literatureandlatte.com/scrivener.php http://www.literatureandlatte.com/scrivener.php Scrivener comes closer than anything else I've seen to meeting the OP's goal.