fixed-size C strings

* removed unused stuff (more to come)
* moved remaining into Common

  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

move the release/debug test in variables.msvc (+ rewrote in a different way)

make sure we define  YY_NO_UNISTD_H on wind32

simplify Visual C++ stuff: removed hacks from configure and created
template "variables" file (so that building with msvc only requires
gnu make)