Add drawing of lat lon graticules when saving dataset

[TAlonglong]

Add drawing of lat lon lines when saving dataset.

Now its possible to add text, contours,borderlines and images on top of the image saved to dataset.

Also add the feature to draw latitude and longitude graticules on the image.

[djhoese]

What does this mean? Could you provide more details?

[mraspaud]

Graticules ?

[TAlonglong]

Please assign it to me