nco/nco: Potato Eaters

Version 5.0.4 contains significant changes to the ncclimo splitter API, minor changes to ncremap's --permute API and to invoking the internal inverse-distance weight generation. Along with these features come generally improved WARNINGs, HINTs, reduced noisiness of diagnostics for frequently used commands, and mitigation of compression issues triggered by netCDF 4.8.0+ library changes. Furthermore, numerous minor improvements to mbtempest and to ERWG support are included