Supervoxel coloring update

This changes supervoxel clustering so that it uses the changes from #849 (new label color handler).
The functions for getting RGB clouds have been deprecated, and the example updated.
The label color handler was also updated so that it uses modulo the max label, rather than random colors. This fixes the problem where colors change if the cloud is updated and is faster.

Also, spacing in the header file was fixed so git doesn't complain anymore.