allow multiple optimization passes

move random seed init in GenerateMesh

fix dangerous clean

API cleanup: removed unused functions

make parser embeddable in code with other parser (yy->gmsh_yy)
more work on headers
fixed lots of gcc warnings

more work on header pollution

start reducing header pollution (removed Gmsh.h + cleaned up GModel & co)

simplify Visual C++ stuff: removed hacks from configure and created
template "variables" file (so that building with msvc only requires
gnu make)

more Visual C++ work

more work for Visual C++

is now "delaunized" using swaps using a "fast" algorithm

rename transf params & remove unused ones in old structs

fix nasty memory bug

	-) 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

fix crash in collapseEdgePass

prelim support for native file chooser from erco