Drop nonsense comments about RootNode.
That subject has more to do with SerializableNode.  Which also might
not be the name we end up with for that.  ID'able Node?  LinkableNode?
@@ -6,12 +6,6 @@ type Node interface {
// GetField resolves a path in the the object and returns
// either a primitive (e.g. string, int, etc), a link (type CID),
// or another Node.
- //
- // If a Node is returned, it will be a unrooted node -- that is,
- // it can be used to view the fields below it, but since it was not
- // originally stored as a full node, you cannot immediately take
- // a link to it for embedding in other objects (you'd have to make
- // a new RootNode with the same content first, then store that).
TraverseField(path string) (Node, error)
// GetIndex is the equivalent of GetField but for indexing into an array
