1999-01-10  Miguel de Icaza  <miguel@nuclecu.unam.mx>

	* src/eval.c (add_value_deps): Reorganization.  Hanlde
	VALUE_CELLREF here and make OPER_VAR and OPER_CONSTANT call
	add_value_deps.

	* src/expr.c (do_expr_tree_relocate, expr_tree_relocate): New
	routine that returns an ExprTree relocated.
	(value_copy_to): Handle the VALUE_CELLREF type.

	* src/expr.h: define VALUE_CELLREF

	* src/parser.y (yylex): Type fix.
	When creating values of type VALUE_CELLREF, set this value.

1999-01-09  Miguel de Icaza  <miguel@nuclecu.unam.mx>

	* src/sheet.c (sheet_move_column): Update to new cell_relocate
	semantics.
	(sheet_shift_row): ditto.
	(sheet_insert_row): ditto.
	(sheet_delete_row): ditto.
	(sheet_shift_col): ditto.

	* src/clipboard.c: Update to new cell_relocate semantics.
	Remove the old GTK compatibility code.

	* src/cell.c (cell_relocate): We do not need to reference this
	formula.
	This routine now takes delta-x and delta-y values for the
	relocation, instead of absolute cordinates.  To implement the
	proper semantics of cell movement that other spreadsheets implement