Limit to particular content types and offer more permissions

Great module!

I'd like to request an option (either in admin/settings/node-agreement or on each content types configuration page) to limit the use of node_agreement to particular content types. This would make this module even more useful and remove unnecessary options in the UI, as the agreement tab currently appears on all content for users with the 'administer node agreement' permission.

Also, additional user permission control would be nice. For instance, a permission to allow users to enforce agreements for only content created by that user. In addition to 'administer node agreements', there could be:

set node agreements for own content
set node agreements for all content

This would enable the content creators/users to decide how node agreements are enforced for their individual nodes!