- add editLastAction function to OE_controller to make possible "live modification"
- add OE_actionSetPointCurve and OE_actionMovePointCurve to OE_actionCurves
- add setPoint function to OE_pointcurve and change getPoint to use reference instead of pointer

- add the interfaceDisplay class that will drive all the user interface and the display->controller interactions

- add instructions class
- add hoop, pulse/mm and zero point in document

- draw controls only for the selected curves and stitchs

- fix a bug in birailstitch class (initialisation of len and maxlen variable was not set)
- add the display of a point at 0,0

second move to a MVC design