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

Covjson mvp

Closes #134

See merge request !378

covjson folder placed into geomagio, sibling to other factory folders. Import module syntax used i.e __init__.py

xmlfactory mvp

Closes #135

See merge request !380