- use typedef FaceType from parent (PrimitivePatch) instead

- can specify 'CofR', 'coordinateSystem' or implicitly (0 0 0)
  which increases the flexibility

- this change was wished by Mattijs and/or Henry

- allow command-line settings to retain the flexibility of 'foamPV'
  alias mechanism.

This reverts commit 2e1e671d.

This reverts commit b18f6cc1.