- renamed surface regions (formerly patches or groups) to surfZone.
- added surfMesh, but without any of the patch information needed to make it
useful for finiteArea.
- promoted coordinateSystem transformation to surfaceMeshConvert and moved
old to surfaceMeshConvertTesting.
- keyedSurface is similar to triSurface, but uses faces
- meshedSurface is sorted in regions and should be more memory efficient
- surfMesh is the placeholder name for an OpenFOAM native surface format