chamfer and wedge library derived from the one in MCAd but wedge is fully new.interface : chamfer (len,r,rs) : rounding of edge along z cylinder_chamfer (majr,r,rs) : circular rounding rnd_wedge (len,lr,angle,r,rs) : wedge with 1 rounded angle circular_rnd_wedge(majr,lr,angle,r,rs) : circular wedge/ 1 rounded angle len : length of extrusion r : rounding radius majr : major radius of circular extrusion lr : dist from left side of rounding center angle : angle of wedge rs : resolution - number of lines in the rounding use rs =0 for straight line chamfer in both chamfers wedges will look funny with rs < 5 or 6