decomposed config into calc and model parts

src/org/opensha/calc/CalcConfig.java

src/org/opensha/calc/Deagg.java

src/org/opensha/eq/model/ClusterParser.java

src/org/opensha/eq/model/FaultParser.java

src/org/opensha/eq/model/GridParser.java

src/org/opensha/eq/model/HazardModel.java

src/org/opensha/eq/model/InterfaceParser.java

src/org/opensha/eq/model/Loader.java

src/org/opensha/eq/model/ModelConfig.java

src/org/opensha/eq/model/SlabParser.java

src/org/opensha/programs/HazardCurve.java