SourceSet refactor

...main/java/gov/usgs/earthquake/nshmp/calc/CalcFactory.java

...ava/gov/usgs/earthquake/nshmp/calc/DisaggContributor.java

...in/java/gov/usgs/earthquake/nshmp/calc/DisaggDataset.java

...ain/java/gov/usgs/earthquake/nshmp/calc/DisaggExport.java

...n/java/gov/usgs/earthquake/nshmp/calc/Disaggregation.java

...in/java/gov/usgs/earthquake/nshmp/calc/Disaggregator.java

src/main/java/gov/usgs/earthquake/nshmp/calc/EqRate.java

...in/java/gov/usgs/earthquake/nshmp/calc/GroundMotions.java

src/main/java/gov/usgs/earthquake/nshmp/calc/Hazard.java

...main/java/gov/usgs/earthquake/nshmp/calc/HazardCalcs.java

...n/java/gov/usgs/earthquake/nshmp/calc/HazardCurveSet.java

...ain/java/gov/usgs/earthquake/nshmp/calc/HazardExport.java

.../java/gov/usgs/earthquake/nshmp/calc/SystemInputList.java

src/main/java/gov/usgs/earthquake/nshmp/calc/Transforms.java

...a/gov/usgs/earthquake/nshmp/model/AbstractRuptureSet.java

...va/gov/usgs/earthquake/nshmp/model/ClusterRuptureSet.java

...n/java/gov/usgs/earthquake/nshmp/model/ClusterSource.java

...ava/gov/usgs/earthquake/nshmp/model/ClusterSourceSet.java

...ain/java/gov/usgs/earthquake/nshmp/model/Deserialize.java

...java/gov/usgs/earthquake/nshmp/model/FaultRuptureSet.java