- this makes it easier to split creation into a two-stage process
as required
- extend handling for polyBoundaryMeshEntries, faBoundaryMeshEntries
with more functionality. Ensure that these are never registered.
ENH: addition writeEntry methods for polyBoundaryMesh
- simplifies streaming and collating into other files
ENH: polyMesh rereading - update owner/neighbour header information
- this avoids accidentally reading the "cells" file if the mesh has
been created with NO_READ and then updated
STYLE: less vertical space when outputting empty PtrList