Librairie graphlib

Specific version of graphlib developed for the SdrSharp plugin application for rtl_433.

The original version can be found at:

specific version of graphlib.

-Processing a single LayoutMode case: VERTICAL_ARRANGED

-the X-labels are defined in pixels to take account of the window width:
plotterDisplayExDevices.SetMarkerXPixels(100);.

-The refreshPoints function(ListPointF>[] tabPoints) allows you to renew the data.

-Graphics are synchronous in X, same zoom and same displacement

-The refreshPoints call changes the data but retains zoom and move.

-The zoom is controlled by the mouse wheel.

-If the point number is less than the pixel number in X of the graph divided by 20, each delta is displayed.