Merge branch 'fault-section-dev' into 'master'

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

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

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

...in/java/gov/usgs/earthquake/nshmp/data/IntervalArray.java

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

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

...n/java/gov/usgs/earthquake/nshmp/geo/json/Properties.java

.../gov/usgs/earthquake/nshmp/internal/NshmFaultSection.java

.../java/gov/usgs/earthquake/nshmp/geo/json/GeoJsonTest.java

...a/gov/usgs/earthquake/nshmp/geo/json/PropertiesTests.java

...usgs/earthquake/nshmp/internal/NshmFaultSectionTests.java

src/test/resources/geo/json/properties-prop-absent.geojson

src/test/resources/geo/json/properties-prop-null.geojson

src/test/resources/geo/json/properties-prop-object.geojson

src/test/resources/geo/json/properties-prop-string.geojson

src/test/resources/internal/fault-section-bad-dip.geojson

src/test/resources/internal/fault-section-bad-id.geojson

.../resources/internal/fault-section-bad-lower-depth.geojson

src/test/resources/internal/fault-section-bad-name.geojson

src/test/resources/internal/fault-section-bad-rake.geojson