1998-09-21  Miguel de Icaza  <miguel@nuclecu.unam.mx>

	* src/expr.c (do_expr_decode_tree): When decoding a tree, include
	the argument separator.  Also, loop properly trough the arguments
	being decoded.

	(function_call_with_values, function_def_call_with_values): New
	functions: these ones are for the plugins so that a plugin can
	invoke other functions in Gnumeric.

	* src/fn-date.c (gnumeric_now): The serial number returned by
	NOW() should be relative to 1900/1/1, not year zero.

1998-09-20  Miguel de Icaza  <miguel@nuclecu.unam.mx>

	* src/expr.c (eval_expr): Fix the way we computed expressions.

	* src/eval.c (cell_eval): Maintain a CELL_ERROR flag to know if
	the value is NULL due to an error or to the cell not being
	evaluated.

	* src/expr.c (funcion_call_with_values): Add a routine to allow
	plugins to call other functions defined in Gnumeric.

	* src/style.c: Handle the pattern property of the styles.

	* src/style.h: Pattern style is now just a 4 bit quantity, instead
	of a RefCounted structure.

	* src/plugin.c: Include gnumeric-util.h