Enable triangulation on all cell sets
The previous implementation of triangulation and tetrahedralization
only worked with CellSetStructured and CellSetExplicit. The
implementation for CellSetExplicit was changed to avoid pulling
any of the raw arrays. Instead, it uses WorkletVisitCellsWithPoints
to pull the appropriate information. This allows it to work with
any CellSet type.
Edited by Kenneth Moreland