[Geojson] Finishing the edits

[Martin Daly]

> Another need for clarification:
> 
> 2.1.1 defines coordinate order as easting,northing,... what did we
> decide to do about CRS's that have different orders? I vaguely
> remember a discussion, but in any case, the spec may want to have a
> single sentence that either says  not to use CRS's that don't have
> easting,northing order or explains what to do.

I recall the decision being that transfer via GeoJSON encoding has to be
in those (easting,northing and longitude/latitude) orders, independent
of the referenced CRS axes order.

M