- add an option to warpStitch method to use 2 lines instead 1 line and 1 normal array

- add some "const" in utils.h

- fix a pan problem (2 time slower than the mouse move)
- add a backgroundColor in displayStyle

- fix a pan problem (2 time slower than the mouse move)
- add a backgroundColor in displayStyle

- add save and load of linkstitches steppoints in .oe files

- add OE_actionDelPointLinkStitch and make it work

- make linkStitches point pickable

- add actions for stepPoints functions

- remove the OE_commandDisplay class (specific functions are merged in OE_diplay)

- add a lot of displayStyle variables

- make first and last point move together when form is closed

- fix a bug in PES loading (incorect stitch sequence)

- warpStitch include now x and y offset for pattern translation
- add xOffset and patternSteps attribute to linestitch and rename offset to yOffset

- set the OE_controler to use the SERIALPORT environment variable
- change the default creation values of linestitch lenth and width

- fix key mapping problem

- use it in OE_actionMovePointCurve
- clear OE_actionSetPointCurve (not used)

- remove some old test functions in OE_controller

- add OE_controller::getSelectionBoundingBox function
- rename "select" function to "picking" in OE_interfaceDisplay (more clear name)
- change selection mode into an editionState in OE_interfaceDisplay
- add scale method to curves and stitchs
- add ScaleSelection state and implement the scale selection actions and UI widget
- clean and comment OE_interfaceDisplay
- add BoundingBox::getCenter method
- add OE_display::screenToDocument method