DOC: mark old visu as deprecated

Code/Visu/otbFixedSizeFullImageWidget.h

Code/Visu/otbFullResolutionImageWidget.h

Code/Visu/otbGluPolygonDrawingHelper.h

Code/Visu/otbHistogramAndTransferFunctionWidget.h

Code/Visu/otbImageAlternateViewer.h

Code/Visu/otbImageToGrayscaleAnaglyphImageFilter.h

Code/Visu/otbImageViewer.h

Code/Visu/otbImageViewerBase.h

Code/Visu/otbImageViewerFullResolutionEventsInterface.h

Code/Visu/otbImageViewerFullWidget.h

Code/Visu/otbImageViewerHistogramAndTransferFunctionWidget.h

Code/Visu/otbImageViewerScrollWidget.h

Code/Visu/otbImageViewerZoomWidget.h

Code/Visu/otbImageWidgetBase.h

Code/Visu/otbImageWidgetBoxForm.h

Code/Visu/otbImageWidgetCircleForm.h

Code/Visu/otbImageWidgetFormBase.h

Code/Visu/otbImageWidgetPointForm.h

Code/Visu/otbImageWidgetPolygonForm.h

Code/Visu/otbImageWidgetPolylineForm.h