Persistence should not assume authentication

[blakeembrey]

At the moment the application makes many assumptions and one buggy one is assuming every implementation of the api notebook will have a persistence layer. Since it's perfectly feasible to have no persistence, we should allow configuration/detection of this.

[doolittle]

Would having an explicit save button solve this? If there's no persistence layer the button simply wouldn't show up?

[blakeembrey]

There isn't any technical changes with a button. We just need the ability to see if there is middleware available for handling authentication/authenticated/save/load/etc.