tmp fix build

- don't play tricks in Extend1DMesh & co: always follow the option (so we
  can predictbly mix point/curvature lcs with fields)

  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

add a Universal Transverse Merctor field, add latitude / longitude and UTM coordinates in Plugin/GSHHS.cpp

- moved some mesh creation utility routines in GModel::
- new MElementFactory
- fixed bad bg mesh index

re-fix Field.h API dependency

fix shift/conflict reduce in parser introduced by Field stuff

make parser embeddable in code with other parser (yy->gmsh_yy)
more work on headers
fixed lots of gcc warnings

start reducing header pollution (removed Gmsh.h + cleaned up GModel & co)

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