Polyline approximation with arcs and segments.

This code is related to the method described on the publication "Polyline defined NC trajectories parametrization. A compact analysis and solution focused on 3D Printing." by Honorio Salmerón Valdivieso.
It also makes direct use of the code published by Taubin in https://es.mathworks.com/matlabcentral/fileexchange/22678-circle-fit-taubin-method

It simply finds an efficient distribution of arcs matching some tolerance requirements and merges them with the source polyline.