"ParametricSurface" (not Plane)

- log vector scaling (idea from bernhard Kubicek)

* implemented first rough draft of VTK mesh writer

  did in high
* added mesh generation error log summary
* removed Parallel subdir (this is now handled by the message class)
* removed Box subdir and consolidated batch processing in a single
  routine
* made List_T into a class
* reduced dependencies in Pview*.h so we can eventually add the post-pro
  interface to the public API

when creating single lib (boundarylayer.cc exists in netgen)

ar on linux is stupid: need to rename predicates.cpp to avoid clash with the
one in contrib/tetgen