hypertidy/ncmeta

rejig for "axis" and "grid"

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RNetCDF returns the axes of a variable, indexed from 0:

RNetCDF::var.inq.nc(nc, var, i)

This means nc_vars must be replaced by nc_axes, and nc_vars becomes just the variables.

Done in axis-of-grid, now merged into master. New funs nc_grids, nc_axes, nc_axis