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)