Get observation of document updates working in the sql server object store.
Implement observable in memory object store.
Make DocumentDBSession implement IObservable<IDocumentUpdated>
Have IDocumentUpdated use object for both Document and Key.
Don't take more dependencies than necessary.
Go back to using string for ids
Add extension to listen for only the documents.
extract interface IDocumentUpdatedNotifier
Prefer composition to inheritance.
Bump and use a correct semver if preversion is used...
Merge branch 'observable-documentdbsession' into develop