Add sample data for NetCDF section of GeoServer quickstart
Add sample data for NetCDF section of GeoServer quickstart

polyphemus_20120401.nc is downloaded from GeoServer 2.10.4 because it
was removed in some later version.

kalxas/OSGeoLive,OSGeo/OSGeoLive,kalxas/OSGeoLive,OSGeo/OSGeoLive,kalxas/OSGeoLive,kalxas/OSGeoLive,kalxas/OSGeoLive,kalxas/OSGeoLive,astroidex/OSGeoLive,OSGeo/OSGeoLive,OSGeo/OSGeoLive,kalxas/OSGeoLive,astroidex/OSGeoLive,astroidex/OSGeoLive,OSGeo/OSGeoLive,astroidex/OSGeoLive,astroidex/OSGeoLive,OSGeo/OSGeoLive,OSGeo/OSGeoLive,astroidex/OSGeoLive