"Flattened String To Variant" node should return "rest of the binary string"

[avogadro5]

When working with binary data it is often useful to parse off "chunks" for stuff like header data and proceed with parsing the rest of the data. I appreciate the fact that the "Unflatten From String" node makes it easy to do exactly that using the "rest of the binary string" output. Let's add it to the similar "Flattened String To Variant" node.