implement Directory Reference

Directories
directory	Display
directory	DisplayCanvas
directory	DisplayDatas
directory	DisplayEvents
directory	DisplayShapes
directory	QtAutoGui
directory	QtPlotter
directory	QtViewer
directory	RegionShapes
directory	Utilities
Files
file	Display.h [code]
file	DisplayDatas.h [code]
file	DisplayEvents.h [code]
file	DisplayShapes.h [code]

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