Update documentat if the class.
SetColor() and SetLabel() now work with 0-based index.
SetColor() now checks length of myColors.
Remove methods GetCurrentColor() and GetCurrentLabel().
Methods GetColor() and GetLabel() now can be used to get user-specified and default colors / labels.
Round down IntervNumber in FindColor().
DrawScale() - show labels even for one interval.
Redesign Draw Harness command vcolorscale, provide new options.
Update test cases which use vcolorscale command.
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