Conflicts:
	include/Algo/Import/importSvg.hpp
	include/Geometry/intersection.hpp

viewer.cpp : check if filename is not empty before opening a mesh. Otherwise SIGSEGV if cancel Open process

adapted comments in localFrame and import2tablesSurface::importPlyPTM and secured localFrame (no more possibility of generating a zero vector)

* 'master' of /home/untereiner/CGoGN:
  ihm3 + stage_shader

* 'master' of /home/vanhoey/CGoGN:
  improvement of localFrame (added some functionalities)
  add localFrame compression support

* 'master' of /home/thery/CGoGN:
  add option to merge close vertices in import (fast method)

* 'master' of /home/vanhoey/CGoGN:
  corrections sur gestion des boundingbox
  decimation countdown correction
  added some comments to importPlyPTMgeneric
  separation in two version of importPlyPTM : one with fixed degree polynomials (F Larue) and one for any degree polynomials (K Vanhoey)
  added generic version of importPLYptm (good for bivariable polynomials of any degree)