- ditched PrimitivePatchExtra in favour of a PatchTools class that is
currently just a collection of static functions. They could equally well
live within PrimitivePatch itself, but isolated also has its advantages.
- MeshedSurface, UnsortedMeshedSurface now have 'regions' instead of
'patches' since they are more like a faceZone for meshed surfaces than
patches. This might avoid confusion at a later stage.
- all formats except ftr and gts are now read as MeshedSurface (thus sorted
immediately). Avoid unnecessary sorting during construction though.
- moved cleanup routines completely into PrimitiveMeshedSurface
- use new HashSet capabilities and sortedOrder function
- make STL format a MeshedSurface instead of an UnsortedMeshedSurface for
better (MeshedSurface) reader efficiency
- added protected storedPoints(), storedFaces() functions for non-const
access to the data. Mixing protected non-const versions and public const
versions of the same method does not agree with the compiler
- better handling of triFace/face distinction
