複数デルタへの適用 #22

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

Create MagnetRONViewer#getRelatedInformation return value is reference
and FieldName.

and too remove MethodExecution in Collaboration#doLastAnimation.
Fix bug in Alias#getTimeStamp() when occurencePoint#isValid().

in CollaborationViewer#createObjectVertices().

by creating MethodExecutionVertex for MethodExecution not only
calledMethodExecution.

 = true that references are equals, and just remove VertexObject from
Arguments.

CollaborationViewer#doLastAnimation().