OutputTimeScale(US#31)

Implemented DiagnoseOutputViewModelTest, DurationToHeightConverterTest, GapToMarginConverterTest, ProcessViewModelTest, SequenceDiagramViewModelTest, ThreadViewModelTest, SequenceDiagram, DiagnoseOutputViewModel, DurationToHeightConverter, GapToMarginConverter, IDiagnoseOutputViewModel, IProcessViewModel, ISequenceDiagramViewModel, IThreadViewModel, ProcessViewModel, SequenceDiagramViewModel, ThreadViewModel

Elements in a sequence diagram are scaled in relation to their duration assuming that the height of a thread grid is the total duration.