GPS data package to support web service

Build geodesy/GPS data service. See ghsc/nshmp/nshmp-dev#11

Migrate gps data code from nshmp-dev

Datasets - one dataset per region per release

• Create similarly formatted conus_2014.csv, ak_202.csv, etc. Standardize headers/fields, but don't add empty fields
• Add raw data files in nshmp-ws/src/main/resources/gps

Adapt subset of nshmp-dev/.../geodesy/GpsData.java for nshmp-ws/src/main/java/gov...www/gps/GpsData.java:

• Enum for supported models
• Class to parse relevant resources and hold references to csv string and geojson (also as string? check with Brandon)
• Methods to return CSV and GeoJSON strings

Delegated to new issue #17 (closed):

• Build data service to return these strings

For README:

Geodesy Process

• In house multi-modeling capability
• Curate/update strain vector fields
• Connectivity in fault models
• Data transfer
  • Modification to Fault Models required by geodetic modelers needs to be communicated back to NSHM
• slip rate uncertainties