- fix bb computation to avoid model jumping around when adding points in z=0 plane
- pass interpol matrices as ref

view limit

small cleanups for 2.0.8

new gui for plugins (much better IMHO!)

- tentative fix for the "mysterious" crashes on Windows:

  I think that the problem comes from the new recursive tetra
  classification, where we probably overflow the stack on Windows. The
  fix is to request a larger initial stack size through the linker.

- added option to control label saving in unrolled geo files

- only test for neg jacobians for 2D/plane meshes for now

- fixed several compiler warnings

added General.MinX, General.MaxX, etc. so that we can easily get the
min/max of a model (useful e.g. to create a box around an imported
STEP model)

added example of mixed step/geo model

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

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

- 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

cleanup

more on clcurv options

spec fltk theme with -theme + minor tweaks

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)

added binary stl export

new option to reverse all the normals (for display). Man, the new code rocks :-)