- fix a bug in OE_fillstitch due to error in detection of intersections between some stitch patterns and patch contours

- fix multi cut bug in cutStitches (bad detection of a stitch cut more than once by the contour)

- add fillstitch to loadFromFile method

- move curves handles when we set a grid control point in OE_fillstitch

- 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