Plugins, versions and the web

[blakeembrey]

We need a simple architecture for registering plugins and creating a custom application build. The plugins need to be able to register their versions to the current notebook as well. All the versions will build a simple dependency list that can be serialised with any persistence method.

When we load a notebook, we don't know what version it was written with (the notebook and plugins). What if it was written with a whole different deployed api-notebook? We need to be able to check this version/plugin data and provide some feedback to the user.