Computing is unified. ComputeFastTol3d() method was deleted.
If intersection result contains 3D- and corresponded two 2D-curves then tolerance will be computed with using BRepLib_CheckCurveOnSurface algorithm (check same-parameter).
If intersection result contains only 3D-curve (getting 2D-curve can be switched off by users) then tolerance will be computed with using GeomAPI_ProjectPointOnSurf algorithm (projects some point of 3D-curve on the surface and finds maximal distance).
Some workarounds have been deleted.
Some test case have been changed.
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