Schema Change Support

[phtech-andyherrmann]

Thanks for this package. We are enjoying using it. One issue we've run up against is Document Versioning. Say, for example we want to update a property on our document from:

public string Selection { get; set; }

to

public List<string> Selection { get; set; }

and we want to update the entities on the fly as we query them from mongodb. Deserializing them into the updated model will cause an error without some way to update the document to the newest version. Do you have a simple way to accomplish this with MongoFramework?