FreeFEM v4.0

• correct bug in RT1Ortho and RT2Ortho 2d in the computation of derivative (2018-01-30, Thank to Bryan.Bosworth@colorado.edu)
• uniformize 2d/3d in element, methode EdgeOrientation(e) now return +1/-1
• change all the sparse matrix structure
• remove all map matrix jan 2019
• surface finite element (in progress)
• nElementonB (version 2d and 3d of nTonEge)
• area ( same the lenEdge) in 3d
• add function labels to get the array of label of a mesh
• add function regions to get the array of label of a mesh
• correct big bug in toRarray,toZarray, toCarray transform [ ... ] array to int[int], real[int], complex[int]