2000-08-30  Jody Goldberg <jgoldberg@home.com>

	* dependent.[ch] : New base class for Cells.
	  Convert everything to access the elements that are now
	  in the cell's base.
	s/Cell::sheet/Cell::Dependent::sheet/
	s/Cell::cell_flags/Cell::Dependent::flags/

	* Makefile.am : Because of XL we need to build plugins before src.
	  That will need changing.

	* src/func.c (function_marshal_arg) : Use expr_array_intersection.

	* src/expr.c (eval_expr_real) : Do implicit conversions from strings
	  to numbers if possible.
	  Access the first element of an array.  NOTE : This is WRONG
	  We need to implement array expression behavior some day.
	(expr_array_intersection) : New routine.