Fix coding hole when packing disconnected components when clusters are used. We need to recreate the cluster tree in the top-level graph, and copy position info from a cloned cluster in a component to the real cluster in the top-level graph. (The clusters in a component are really copies.); use graph granularity by default when packing; clean up layout info in the clusters before deleting them; add comments on functions; free cluster labels (this has never been done).
Fix coding hole when packing disconnected components when clusters are used. We need to
recreate the cluster tree in the top-level graph, and copy position info from a cloned
cluster in a component to the real cluster in the top-level graph. (The clusters in a
component are really copies.);
use graph granularity by default when packing;
clean up layout info in the clusters before deleting them;
add comments on functions;
free cluster labels (this has never been done).

jho1965us/graphviz,kbrock/graphviz,kbrock/graphviz,kbrock/graphviz,BMJHayward/graphviz,tkelman/graphviz,MjAbuz/graphviz,pixelglow/graphviz,jho1965us/graphviz,jho1965us/graphviz,BMJHayward/graphviz,tkelman/graphviz,BMJHayward/graphviz,tkelman/graphviz,jho1965us/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,kbrock/graphviz,pixelglow/graphviz,pixelglow/graphviz,BMJHayward/graphviz,tkelman/graphviz,MjAbuz/graphviz,tkelman/graphviz,jho1965us/graphviz,kbrock/graphviz,tkelman/graphviz,MjAbuz/graphviz,kbrock/graphviz,tkelman/graphviz,MjAbuz/graphviz,jho1965us/graphviz,pixelglow/graphviz,tkelman/graphviz,ellson/graphviz,pixelglow/graphviz,pixelglow/graphviz,ellson/graphviz,MjAbuz/graphviz,kbrock/graphviz,ellson/graphviz,jho1965us/graphviz,pixelglow/graphviz,jho1965us/graphviz,ellson/graphviz,BMJHayward/graphviz,MjAbuz/graphviz,ellson/graphviz,ellson/graphviz,tkelman/graphviz,MjAbuz/graphviz,pixelglow/graphviz,BMJHayward/graphviz,pixelglow/graphviz,pixelglow/graphviz,tkelman/graphviz,kbrock/graphviz,ellson/graphviz,kbrock/graphviz,MjAbuz/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,ellson/graphviz,kbrock/graphviz,ellson/graphviz,MjAbuz/graphviz,jho1965us/graphviz,kbrock/graphviz,pixelglow/graphviz,ellson/graphviz,BMJHayward/graphviz,tkelman/graphviz,ellson/graphviz,BMJHayward/graphviz,jho1965us/graphviz,jho1965us/graphviz