Interpolation state check is fixed to mark as valid only ordered sequences of poles.
Refactoring of Approx_SameParameter.cxx.
Test case is added.
Test cases are updated to the new behavior.
Update of testing cases
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.