Add a field to choose if title is visible or not

Hello, 
Very good job this cms.

I would like to hide the title of a node.

- add a field to nodes table
ALTER TABLE `nodes` ADD `show_title` TINYINT( 1 ) NOT NULL DEFAULT '1' AFTER `title` 
-add if ($node['Node']['show_title']==0) $node['Node']['title']= ''; to nodes_controller.php (action view)
- add echo $form->input('show_title'); into nodes/admin_add.ctp
- add echo $form->input('show_title'); into nodes/admin_edit.ctp

Thanks a lot for your work