- temporary fix for creation of second order vertices on periodic
  curves and periodic surfaces

- speedup 2nd order vertex creation

- never create MFaceVertices if we don't know the parametric
  coordinates (this will screw up the 2nd order algo!): create
  MVertices instead

- fixed u,v coords of vertices after elliptic smoother in
  meshGFaceTransfinite

- added "-format msh1" and "-format msh2" shortcuts to quickly
  select the version of the msh format from the command line +
  added "med" and "cgns" formats

- moved gui guidelines in separate file

better configure for MED

added MED export capability (merci Pascale!!)

- using quads to draw 2nd order elements was a bad idea (they can be
non-plane, so the normals computed for lighting did not always look
nice). It's better to just split each quad into 2 triangles.

- import THEM in ParseString

- subclassing higher order vertices is not a good idea--it makes the
identification hard in the I/O layer. So let's just store a char for
the order like we did in the old versions

- fixed license.texi and in License.cpp

- removed unused GEntity::inClosure()

fix logic + crashes w/ bgmesh on file

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

- nicer display of second order elements (don't draw internal edges)
- nicer display of second order vertices (color like in 1.65)

added some debug code

- save physicals labels when saving unrolled geometries
- fixed crash in unrolled geo save (discrete points)
- Delete Physicals now also deletes the physicals in GModel
- removed unused rules and terminals in parser
- put at least one mid-point when meshing non-straight lines
  in OCC: this fixes most of the trivial 2d meshing problems

- only delete selected physicals (instead of all of them; for philou)
- move "save" button in visibility window
- small logic fix in mesh draw

fixing build without GSL

added gui for OCC healing

fix for youngae's new iv files

(They use 'keyword[' instead of 'keyword ['. Sigh...)

set min num pts=2 for OCC circles (fixes bug in Mblade.iges)

simplify selection colors (keep only one) and add 3 highlight colors

- 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

- fixed infinite loop in edge loop creation (when the loop is wrong, just print
 a message and abort)

- introduced options to control healing of OCC models

removed gobal meshSize in GMODEL: for now use CTX.lc, which is correctly
updated when multiple files are merged

fix logic for 3d delaunay

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

hybrid extruded/unstructured from ruth

- new option Geometry.Tolerance (or -tol on the command line) to set the
tolerance for the old CAD engine, for OCC healing and for STL import

- removed more unused options

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

better names for mesh algo #defines

removed most unused, untested or non-working stuff in old CAD code

- bug fix: need to create temporary bounding box and compute CTX.lc
*during* parsing step until we fill the new db on the fly

(Some geo transforms in the parser use CTX.lc for tolerences. But
CTX.lc was always equal to 1 since we only do a SetBoundingBox on
GModel after parsing!)

- cleanup spline interpol (remove duplicate code)