v1.3.0

• New arrow style for ScalarField Layer, based on leaflet-geotiff plugin. This is a new renderer activated withtype: vector (vs. default colormap) and it is useful when loading a 'direction' field (0-360º).
• Raises an error when dealing with no regular cell sizes (width !== height). The coordinate calculus is based on regular cells, but irregular grids could be used under some circunstances, generating spatial inconsistencies without a warning.
• Fixes wrong derived values in VectorField.getScalarField when no vector is available (zs have to be null); this allows the user to eliminate some previous inFilter functions to discard those values.