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Author : dce
Date   : 16/12/1998
Object : Add of new messaging system in load phase
Modified files : IGESBasic_ToolSingularSubfigure.cxx
                 IGESBasic_ToolGroup.cxx
                 IGESBasic_ToolGroupWithoutBackP.cxx
                 IGESBasic_ToolSubfigureDef.cxx
                 IGESBasic_ToolSingleParent.cxx
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Author : ied
Date   : 26/11/1998
Object : Initialisation of the history for K4L
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Author : szv, smh
Date   : 16/04/1999
Object : S4163
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