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)

cleaned up InterpolateSurface/Curve (get the negative curve dircetly in InterpolateCurve)

reintroduced fix for transfinite mesh on 3-sided transfinite surfaces: the problem was still there

fixed interpolation of ruled surfaces created by extrusion

fixed interpolation of trimmed ruled surfaces

fix gcc warnings

- removed ugly fix in transf mesh of tri surf
- use MFaceVertex params in boundary mesh if available
- cleanup intro chapter in docs

are more correct)

fix err msg

revert last patch (the behaviour is a bit more complex than that, since we
actually really discrard the physical definitions when we do "save all"), and
just use better wording instead

reverse gui logic for "save_all" (IMHO much easier to understand this way)

Added basic support for physicals in all mesh formats that ignored physicals
before (stl, vrml, mesh, bdf, pos). This way we can use the physical mechanism
to only save parts of the mesh (like we do it now for msh and unv files).

Next step will be to add an option to only mesh the physicals (and their
dependencies). This is very useful for large models and/or for debugging.

pp

better mousewheel interaction

free vol mesh befire surf mesh