- add static/protected member function subsections
  - static members up front, constructors/destructors next
    private/protected/public members next

- read 'ftr' triSurface format
- added 'ofs' (OpenFOAM Surface) as new all-in-one surface format candidate
- trying to get some sanity into the surface patch classes, but called it
  'surfGroup' (for now) to avoid conflict with existing 'surfacePatch'
- add read() member like Mattijs suggested

porousZone constructor in the same order as sampling

 - improves efficiency throughout