Create LoadDocument() method to be an analog to GetDocument()

There should be an equivalent method to simply "Load" a pre-made document:

static public IDocumentResult<T> LoadDocument<T>(this Couchbase.Core.IBucket bucket, IDocument<T> doc)

{ var res = bucket.GetDocument<T>(doc.Id); doc.Value = res.Value; doc.Cas = res.Document.Cas; return res; }

or similar