SquareConfusion function was created in FoundationClasses module -> TKMath toolkit -> Precision package.
The function returns square of Precision::Confusion().
SquareConfusion function was corrected in FoundationClasses module -> TKMath toolkit -> Precision package.
Squares of Precision::Confusion() were replaced by Precision::SquareConfusion().
Is2DClosed() added to reject an improper existing surface
Add OnlyClosed=Standard_False argument
Call BRepLib_FindSurface with OnlyClosed=Standard_True
fix Is2DClosed() to check intermediate points of wire in 2D
fix Is2DClosed() - correct tolerance used for the last point
fix Is2DClosed() - correct getting 2d points to compare
