polish

- preliminary work to interface more parser functions with general
  GEntities

- we can now export simple GModels as.geo files (points, straight line
  segments, plane surfaces, ruled surfaces and volumes are treated
  correctly; all non-straight-line curves are exported as splines; all
  non-plane/ruled surfaces are not exported)

- tentative fix for the unv export problem reported on the mailing
  list (fprintf() buggy on some machines??)

- new IO (both read and write) for structured grids using the NASA
  Plot3D format (for Olivier)

fix syntax for hole carving

- boundary layer can now be generated by using a post-pro view for the
  normal field

- added more operations on lists in parser (FExpr * FExpr_Multi, etc.)

- new "hole carving" code to create extruded grids carved out around
  some surfaces (the resulting cavity can be filled with "grout" using
  the unstructured algos)

- check if bboxes of post-pro views are not == VAL_INF before adding
  them to the model bbox (bug report from Renaud Sizaire)

- fixed crash in LCM_xxx tensor drawing code when no tensor points are
  available. (This piece of code should be cleaned up further--no time
  for that now.)

- generalize Levelset plugins so that they work on point data sets

don't try to interpolate a BoundaryLayerCurve!

missing #ifdef

polish + remove unused striping lib

add comment

more fixes for order > 2

one more fix :-)

bug fix for 2nd order quad faces

more corrections to high order stuff

full 2nd order prims+hexas still incorrect

bug fixes in new high order element code

revert some changes from jf's last commit

make depend + fix warnings

Arghhhhhh! Fixed very nasty out-of-bounds bug in 2D mesh algo...

It led to seemingly random Windows slowdowns/crashes: we were passing
random numbers to curve interpolation, and straight line interpol does
"while(not in bounds) i--" which would take forever to get/ back into
reasonnable interval

fix depend

new boundary layer mesh generator

refactored smooth value/smooth normal code into single SmoothData.* file

remove extra volume

add more step/stl benchmarks

general, but ProjectPointOnSurface for example would fail on plane
surfaces)