fix(updateModel): $digest collision

Greetings!

This PR fixes issues where Redactor updates the body of the editor, but the directive encounters digest collisions during Redactor's DOM updates. This wraps scope.$apply in a $timeout to avoid this, much like is already done elsewhere in the directive. Also: I recognize I bumped the version, which is probably not being a good citizen - you might want to do that yourself. Just let me know and I will strike it out.

Please let me know if you have any questions! Thankyee.