set gas_opt=15 for hawkeye, new viirsj2 sensor_info.dat, updated share/cloud/common/N2001_2017_ALBEDO_CLIM.nc to new indexing order, updated dtdb, added nader time to l1cgen grid, improved exit values for modis_atteph, new aerosol tables without NaNs for czcs, goci, hawkeye, hico, meris, aqua, terra, octs, olil8, olil9, seawifs, viirsj1, viirsj2, viirsnpp