Give FoliatedTriangulation a copy constructor
Give FoliatedTriangulation a copy constructor

private data members within FoliatedTriangulation store iterators to
parts of the Delaunay triangulation data member. When that
triangulation is copied, those references need to be updated also.

acgetchell/CDT-plusplus,acgetchell/CDT-plusplus,acgetchell/CDT-plusplus