Fix backward compatibility in, and deprecate image.py

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>
Fix logging.

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>
Merge branch 'pre-master' into unstable

Conflicts:
	mpop/imageo/geo_image.py

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>