Mixin for any dataset where the contents are in NetCDF.
This may provide a good default for any NetCDF-based dataset. The reading routine will take the most commonly occurring dimension as the ndarray axes, and the rest within structured multidimensional dtype.
USE WITH CARE! PROVISIONAL API!
This one should use xarray, of course! See https://arts.mi.uni-hamburg.de/trac/rt/ticket/145
Initialize self. See help(type(self)) for accurate signature.