removed unused fct

removed GFace::GraphicsRep and reimplemented it using the more general
STL vertex array

use geom.tol in FinishUpBoundingBox

rewrote Pplugin(Triangulate) to use our in-house divide and conquer algo
removed triangle from contrib
reactivated OCC STL meshing

- fixed embedded version
- removed OCC STL meshgen for now (OCC/triangle clashes with our own version
of triangle)

removed vestiges of "discrete point" hack in gmshVertex & co (now that
we have the correct discreteXXX classes)

bbox drawing of geo entities for debug (disabled)

Add VI and SI to adaptiveViews, I hope there was no good reason for the to not be there. It seems to work...

allow multiple optimization passes

move random seed init in GenerateMesh

fix dangerous clean