Now Extrema_LocateExtPC object is used instead of ShapeAnalysis_Curve::CurveNewton().
Removed CurveNewton() function.
Removed code protecting against null-length b-splines (should be obsolete now).
One TODO removed in test heal *advanced W6
Conflicts:
tests/heal/data/advanced/W6
Fixed regressions:
did 011 A6 C9
xsat 101 G6
Small syntax fix.