Merge pull request #158 from tmkpath/dev

Updates to scenario XSD for signal timing sets and signal schedule hierarchy updates
Updates from XSD: SignalPlanScheduleSet, SignalTimingSet, and some internal fields
Merge pull request #159 from javierhe/dev

Updates from XSD: SignalPlanScheduleSet, SignalTimingSet, and some inter...
Fix wrong references to JAXB classes
Merge pull request #160 from javierhe/dev

Fix wrong references to JAXB classes