AnalysisInitialization(US#18)

Implemented SessionViewModel, IAnalysis, SequenceDiagramAnalysis, SequenceDiagramViewModel, ISequenceDiagramViewModel, SequenceDiagram

User can see the loaded analysis in the corresponding session tab.
Merge pull request #14 from GraphalyzerPro/AnalysisInitialization(US#18)

AnalysisInitialization(US#18)
ReceiverInterfaceFlexibility(US#20)

Implemented InformationEngine, IInformationEngine, IReceiver.

User can analyse static and dynamic receivers.
Merge pull request #15 from GraphalyzerPro/ReceiverInterfaceFlexibility(US#20)

Receiver interface flexibility(us#20)