Need CRD to return the labels/levels of each node.

[dgleich]

Can we get CRD to return the labels and levels of each node so that we can (if we want) post-process the result with a sweep-cut to make it more like the spectral algorithms?

[dgleich]

We should also add the iteration that CRD discovers a node as this can be helpful information to visualize the "diffusion" of the results and pick out smaller clusters inside...