OutputStandardScale(US#35)

Implemented DurationToHeightConverterTest, GapToMarginConverterTest, SequenceDiagram, DurationToHeightConverter, GapToMarginConverter.

Now time scale is 5 seconds per tab height.
Merge pull request #35 from GraphalyzerPro/OutputStandardScale(US#35)

OutputStandardScale(US#35)