- add some actions to clear selections

- add a toggle close function for last selected curve (C key)

- 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 unselection with "control" key

- create an actionSelection only when there is a selection

- improve selection mode to create only one action for each clic
- fix problem on delete of some stiches

- fix the key callback in interfaceDisplay
- fix some bugs during embroidering

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