Vcs3d unstructured grid plot improvements

Fixes a hang that occurs in communication with sub-procs when plotting an unstructured grid variable in vcs3D.  Also adds some diagnostics.
but it just "prints to the screen" it doesn't return a list. Anyhow I see you have a getParameterList() somewhere so that is all the we need, it we want to actually query values of all the parameters, call getParameterList() then loop through it and get the actual parameter.