Document the winding order of cell boundary points

[iverase]

I think points are always returned with clockwise orientation? (I always get confused with this definition) but there is nothing in the documentation. It is valuable information and it would be nice to be documented.

[nrabinowitz]

I think it's the opposite, the points are always counter-clockwise. This follows the GeoJSON spec for the outer ring of polygons. Agree that we should document this, it's a fixed element of the API.

[iverase]

Oh yes, you are totally right. Points are counter-clockwise, e.g the signed area is positive.