make depend

Removed the "search around point" strategy when we provide a background mesh.

(Now that we can have several fields, it's much better to specify another default
field for when a search fails.)

Detect when we have zero lc and fix it (+ send an error message)

OCCFace::containsPoint() did not correctly take orientation of edge loop
into account (fixes bug reported by Jacques Kools about cross in OCC plane
faces not drawn)

commited. It allows to remove self intersecting meshes in
the 2d mesh generation process. It only applies now to
gmsh native CADs. Those limitations will quicky go away

- fixed remeshing of boundary layers when geo entities are constructed
using bnd layer points (no need to reload the file from scratch anymore
to avoid accumulating the transformations)

- patch load_gmsh.m for .msh version 2 (patch from Raoul)

- new load_gmsh2.m from the mailing list

add experimental support for automatic on-the-fly boundary computation
in vertex arrays

new Mesh.RefineSteps to control how many refinement steps we perform in
2D MeshAdapt-based algorithms

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)

moving to new post-processing database

                    *** WARNING ***

do not upgrade if you need plugins or adaptive views: these have not
been ported (yet) to the new database

                    *** WARNING ***

fix logic for unconstrained bgmesh

added simple boundary operator in parser

lots of improvements to boundary layer generation: we can now constuct
and mesh models with entities connected to boundary layer points, edges
and faces

fix position of BoundaryLayerPoints

- removed static GMODEL (can now have multiple models)
- added infrastructure for new post-processor module

fix some of the demos + clarify some comments

cleanup previous commit + move "carve hole" routines in separate file

Temporary fix for 'could not find extruded vertex' bug.

This is a serious bug, which is related to the way we use std::set to
search for points: cf. benchmark/bug/test_problem_point_set_search.cpp

THIS PROBLEM IS ALSO PRESENT IN BDS. WE NEED TO FIND A BETTER FIX!