2003-07-04 Henrik Brix Andersen <brix@gimp.org>

Added persistent storage of image grid in XCF files.

* app/core/gimpimage.[ch]: removed gimp_image_get_grid() and
gimp_image_set_grid() ...

* app/core/Makefile.am
* app/core/gimpimage-grid.[ch]: ... and added them to these new
files. Added gimp_grid_parasite_name(), gimp_grid_to_parasite()
and gimp_grid_from_parasite() functions.

* app/core/gimpimage-snap.c
* app/gui/grid-dialog.c: #include "gimpimage-grid.h"

* app/core/gimpimage-undo-push.c: #include "gimpimage-grid.h".
(gimp_image_undo_push_image_grid) mark image as dirty.

* app/xcf/xcf-save.c (xcf_save_image_props): save GimpGrid object
as a parasite.

* app/xcf/xcf-load.c (xcf_load_image): load GimpGrid from
parasite.

* devel-docs/parasites.txt: documented the new "gimp-image-grid"
parasite.