and too remove MethodExecution in Collaboration#doLastAnimation. Fix bug in Alias#getTimeStamp() when occurencePoint#isValid().
Add CollaborationAliasCollectorTest and CollaborationAliasCollector#sort(), Alias#getTimeStamp(), sample of plural delta.
Add curved edge drawing when 3control points on the side. Change occurrencePoint.getMethodExecution().getSignature() in Alias.getMethodSignature().