* app/core/gimpimage-sample-points.c
	* app/core/gimpimage-sample-points.h: new files

	* app/actions/view-actions.c
	* app/actions/view-commands.c
	* app/actions/view-commands.h
	* app/config/gimprc-blurbs.h
	* app/core/Makefile.am
	* app/core/core-enums.c
	* app/core/core-enums.h
	* app/core/core-types.h
	* app/core/gimp.c
	* app/core/gimp.h
	* app/core/gimpimage-crop.c
	* app/core/gimpimage-duplicate.c
	* app/core/gimpimage-flip.c
	* app/core/gimpimage-rotate.c
	* app/core/gimpimage-scale.c
	* app/core/gimpimage-undo-push.c
	* app/core/gimpimage-undo-push.h
	* app/core/gimpimage.c
	* app/core/gimpimage.h
	* app/display/gimpdisplayoptions.c
	* app/display/gimpdisplayoptions.h
	* app/display/gimpdisplayshell-appearance.c
	* app/display/gimpdisplayshell-appearance.h
	* app/display/gimpdisplayshell-callbacks.c
	* app/display/gimpdisplayshell-draw.c
	* app/display/gimpdisplayshell-draw.h
	* app/display/gimpdisplayshell-handlers.c
	* app/display/gimpdisplayshell.c
	* app/display/gimpdisplayshell.h
	* app/widgets/gimphelp-ids.h
	* menus/image-menu.xml.in: add support for a list of "sample
	points" in each image, coded and handled very similarly to
	guides, for use mainly in color correction.  See bug #137776.