createEdgeToObject, createObjectVertices.
Migrated method from DeltaViewer to MagnetRONViewer and
CollaborationViewer.
Add CollaborationViewerSampleTest.

Create CollaborationObjectCallGraph to merge ExtractedStructure and add
relatedPoint, getCallTree().
Create IObjectLayout to create merge delta layout.

Add IObjectCallGraph, MagnetRONViewer is parent of DeltaViewer,
CollaborationViewer.