2011-10-21 Andreas J. Guelzow <aguelzow@pyrshep.ca>

	* src/cell-draw.h (cell_draw): add argument
	* src/cell-draw.c (cell_draw_extension_mark_bottom): new
	(cell_draw_extension_mark_left): new
	(cell_draw_extension_mark_right): new
	(cell_draw_h_extension_markers): new
	(cell_draw_v_extension_markers): new
	(cell_draw): add argument and call the above
	* src/item-grid.c (item_grid_draw_merged_range): adjust call to
	cell_draw
	(item_grid_draw_region): ditto
	* src/preview-grid.c (preview_grid_draw_region): adjust call to
	cell_draw
	* src/workbook-view.h (_WorkbookView): add field
	* src/workbook-view.c (wb_view_set_attribute): handle new
	property
	(wb_view_set_property): ditto
	(wb_view_set_attribute): ditto
	(workbook_view_class_init): install new property
	(workbook_view_new): initialize new property

2011-10-21  Andreas J. Guelzow <aguelzow@pyrshep.ca>

	* dialog-workbook-attr.c (attr_dialog_init_cell_marker_page): handle
	cell extension toggle
	* workbook-attr.ui: add cell extension marker toggle