Plugin API

[Benjamen Keroack]

Need a real plugin API, instead of regenerating and passing the entire data layer (along with ad hoc other objects) to plugins.

[Benjamen Keroack]

With recent rewrite, DataService and friends actually is halfway decent. I don't think there's much value in repackaging at least that core data model functionality in a different API. Still have to think about how to expose the async functionality and salt in particular.

[Benjamen Keroack]

A versioned, documented plugin API has value, even if it is only a thin wrapper over the internal API.