create aashto sub-project

src/aashto/build.gradle

src/aashto/openapi.properties

...gov/usgs/earthquake/nshmp/netcdf/NetcdfGroundMotions.java

...uake/nshmp/netcdf/reader/BoundingReaderGroundMotions.java

...s/earthquake/nshmp/netcdf/reader/ReaderGroundMotions.java

...ava/gov/usgs/earthquake/nshmp/netcdf/www/Application.java

...ov/usgs/earthquake/nshmp/netcdf/www/NetcdfController.java

...rthquake/nshmp/netcdf/www/NetcdfServiceGroundMotions.java

src/aashto/src/main/resources/aashto-example.nc

src/aashto/src/main/resources/application.yml

src/aashto/src/main/resources/logback.xml