1.0 breaking changes: Fields()

[stijnherreman]

I think http://nest.azurewebsites.net/breaking-changes.html should mention some more information regarding the Fields() change.

Previously, Documents was a collection of T with just the specified fields filled in, other fields would be null of have their default value. Now, Documents is an empty collection.

Previously, DocumentsWithMetaData -> Fields would be an instance of T with just the specified fields filled in, other fields would be null or have their default value. Now, Hits -> Fields is (backed by) a dictionary containing only the specified fields.

[Mpdreamz]

This is one of the most common problems people face when upgrading to elasticsearch 1.0. Love the pointers on how we can improve our docs on this 👍 I really appreciate the fresh view into this :)