- add a new exemple svg pattern (aplique)

add a new subcurve class (parametric subcurve) and a joincurve (concatenate curves)

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