Add variometer stations

See merge request !387

Runner tag updates

See merge request !383

Imagcdf factory mvp

See merge request !368

Better mapping of publication level to imag or imf. Compression and Fill Value constants. Code simplified.

accept and use file path is provided via --input-file argument, else try urlTemplates path. Network as a custom global attribute

Nonstand elements implemented. Temperatures un-implemented. no longer extends streamfactory on imagcdf input, parse string removed. basic is valid imagcdf logic.

tweaks to accept output_args. temperature-type elements as a nonstandard geomagnetic field element instead of as Temperature cdf variable

Netcdf mvp

Closes #136

See merge request !379