- fix problems on linestitch interactive creation

- add creations function
- change functions in joincurve class to insert new curves anywhere and remove them
- add an action to create and add a subcurve to a joincurve

- add some actions to clear selections

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

Conflicts:
	include/OE_controller.h
	src/OE_controller.cpp

- now discretized points are stored in a new 2d point type "vector_2dt" witch store the t parameter too

- 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

- add a new exemple svg pattern (aplique)

- doxygen refresh
- add some exemple patterns

- add function to drive the embroidery hardware
- add a background grid into the editor view
- add a new motif into linestitch

- add start command
- in commanDisplay there is no more bug with the color of the first stitch

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

- replace the array (curves, stitches, threads,...) by list to be more flexible with delete and moves of elements
- refresh curves only when needed

declare dependents objects to their reference (to be able to remove the reference without error)

- draw controls only for the selected curves and stitchs

- move the maxlen attribute to OE_stitch class with a stitcchMaxLen funct (every child class can use it)
- add a defaultLinkMaxLen for the linkstitch class
- remove start and end attribute in linestitch (subcurve class make them obsolete)
- add get functions for curves in OE_controller class

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