SEISMICDESIGN-179: GriddedDataFactory Null Handling
SEISMICDESIGN-178: Subscript second character for SS and S1 for all cases in output window
Merge pull request #17 from aanderson-usgs/SEISMICDESIGN-179

SEISMICDESIGN-179: GriddedDataFactory Null Handling
Capitalized subscripted S in Ss.
Merge pull request #18 from aanderson-usgs/SEISMICDESIGN-178

SEISMICDESIGN-178: Subscript second character for SS and S1 for all cases in output window