Add Save as Draft and Simplified Menu Admin modules.

A couple of nice usability wins picked up from Panopoly:

* https://drupal.org/project/save_draft
* https://drupal.org/project/simplified_menu_admin

I figure two separate pull requests would create a merge conflict (since they "go in the same place in the file" relative to the 7.x os_project.make) -- so that's why both are one pull request.