add a maxlen option for the birail stitch (add intermediate point when a stitch is longer than maxlen)

refresh doxygen documentation

second move to a MVC design

add a OE_svgParser class to fill the document
first move to a MVC design

- for closed curves (now the function loop when the start point is after the end point)
- add a rev param to reverse the curve sens

subcurve only work if start<end for now