A minimal Gmsh "null" model can now be embedded with no external dependencies

more work on header pollution

	-) A bug has been corrected in the MeshAdapt Procedure
	-) The 2D Delaunay is now Anisotropic
	-) 3D Sliver removal procedure has been improved
	-) Curvilinear mesh generation has been slightly improved,
	   even if it is still far from done
JFR

better normals

- don't use vertex arrays for quads anymore (they are wrong for non-plane
quad faces): just use triangles everywhere

- removed _links in PView

- various small cleanups

all that was there is back (can be enhanced later)

start reintro high order rep

rewrote vertex array code for meshes in the same way we do it now for
post-processing (much simpler, pretty much same speed, and takes a bit
less memory)

start new gui for reparameterization

we use the Lawson algorithm for 3D surface and the smallest circumsphere
of the triangles as circumcircle.

JFR

patch for Debian folks (gcc 4.3)

- implemented all missing 2nd order representations
- removed unused member functions in GFace + cleaned up GFace::point

- fixed missing return value in OCCVertex::reparamOnFace

- added code to highlight orphan entities (dave's idea)

- added gui for incomplete second order elements

- removed ugly static variables in 1d algo

- made sure we remove all 2d order vertices before generating new ones

- added exception to GPL for triangle/tetgen
- fixed some command line switches
- added option to antialiasing OpenGL rendering

- reimplemented subdivision of extruded meshes
- fix indent + unused var + gcc warnings all over the place

bidir db: phase 2 -- removed all (well, most of) the old data structures and
algorithms

more mesh edit work

use MVertex::distance + better check in writePOS

also for unv

make negative physical entities behave like they're supposed to

added routines output (incomplete) second order elements in BDF

SAME REMARK AS WITH UNV: PLEASE TEST THE NODE ORDERING

added full support for incomplete second order elements (8-node quad,
20-node hexa, 15-node prism and 13-node pyramid):

- second order generation algorithm can now be told to generate either
  complete or incomplete elements

- MSH I/O routines can deal with all elements

- UNV I/O routines now support all the elements in the I-deas spec (I did
  my best to follow the spec for the ordering of the nodes, but I might have
  made some mistakes: PLEASE TEST IF YOU HAVE ACCESS TO A CODE OTHER THAN
  GMSH THAT CAN READ/WRITE UNV FILES)

- Use correct vertex ordering for second order simplices in UNV format
(thanks to Romuald Conty <conty@phimeca.com>)

- MLine2 -> MLine3

- finished Nastran BDF implementation (read+write in all BDF formats:
  free field, small field & long field)
- improved UNV and Medit import
- added detection of bad vertex indices in all import routines
- fixed bug in 2nd order quad constructor