- faceBitSet, pointBitSet and faceBoolSet (similar to cellBitSet)
* allows topo sources in a wider variety of places.
* With copy or move constructors.
- cylinderToPoint, searchableSurfaceToFace, searchableSurfaceToPoint,
sphereToFace, sphereToPoint sources
- optional innerRadius for sphere and cylinder sources to treat as hollow.
- support "sets" as well as "set" for cellToCell, faceToFace... sources.
* convenience and avoids writing the set during processing.