vtb: as requested by RJ, on import of image without projection, give 	user the choice to specify it, use the current, or cancel vtb: added support for images of greyscale TIF w/o palette
vtb: as requested by RJ, on import of image without projection, give
	user the choice to specify it, use the current, or cancel
vtb: added support for images of greyscale TIF w/o palette

markraz/vtp,markraz/vtp,nakijun/vtp,seanisom/vtp,markraz/vtp,seanisom/vtp,nakijun/vtp,nakijun/vtp,seanisom/vtp,nakijun/vtp,seanisom/vtp,seanisom/vtp,markraz/vtp,nakijun/vtp,markraz/vtp