Merge branch 'issue-63' into 'master'

...va/gov/usgs/earthquake/nshmp/calc/DistributionFormat.java

...thquake/nshmp/eq/fault/surface/DefaultGriddedSurface.java

...sgs/earthquake/nshmp/eq/fault/surface/RuptureScaling.java

...n/java/gov/usgs/earthquake/nshmp/eq/model/AreaSource.java

...ain/java/gov/usgs/earthquake/nshmp/eq/model/Distance.java

...a/gov/usgs/earthquake/nshmp/eq/model/PointSourceType.java

src/main/java/gov/usgs/earthquake/nshmp/gmm/Gmm.java

...main/java/gov/usgs/earthquake/nshmp/gmm/GmmAttribute.java

src/main/java/gov/usgs/earthquake/nshmp/gmm/GmmElement.java

src/main/java/gov/usgs/earthquake/nshmp/gmm/GmmInput.java

src/main/java/gov/usgs/earthquake/nshmp/gmm/Imt.java

...a/gov/usgs/earthquake/nshmp/internal/SourceAttribute.java

...ava/gov/usgs/earthquake/nshmp/internal/SourceElement.java

...ain/java/gov/usgs/earthquake/nshmp/internal/UsRegion.java

...ov/usgs/earthquake/nshmp/internal/www/meta/ParamType.java

...a/gov/usgs/earthquake/nshmp/internal/www/meta/Status.java

...test/java/gov/usgs/earthquake/nshmp/EarthquakesTests.java

src/test/java/gov/usgs/earthquake/nshmp/FaultsTests.java

src/test/java/gov/usgs/earthquake/nshmp/MathsTests.java

.../java/gov/usgs/earthquake/nshmp/data/DoubleDataTests.java