This is a (very rough for now) prototype that allows Sling content to be edited from create.js.
To test this:
* Start Sling
* Configure "Allow Anonymous Accees = false" in the Authentication Service config at /system/console (login: admin/admin).
* Build and install this bundle
* Edit at http://localhost:8080/content/createjs.html (login: admin/admin)
* Check results at http://localhost:8080/content/createjs.tidy.json