2000-03-22  JP Rosevear  <jpr@arcavia.com>

	Small sort improvement, initial persistent attribute support
	(workbooks only).

	* src/xml-io.c (xml_arg_set): Set an arg value based on type and
	contents in the xml tree.
	(xml_arg_get): Get a string representing an arg's value.
	(xml_write_attributes): Create the list of attributes.
	(xml_free_arg_list): Function to free the args in a GList.
	(xml_read_attributes): Read the attributes back in from the
	xml tree.
	(xml_workbook_read): Read the workbook attributes in and set them.
	(xml_workbook_write): Write out the workbook attributes.

	* src/workbook.c (workbook_class_init): Add three args, the h & v
	scrollbars and the notebook tab.  Override parent set_arg and
	get_arg functions.
	(workbook_set_arg): New function to handle arg setting.
	(workbook_get_arg): New function to handle getting args.
	(workbook_set_attributev): Set a whole list of args for the
	object.
	(workbook_get_attributev): Return an array of args for the
	workbook.

	* src/workbook.c (sort_cmd): Sort all the columns in order so
	that ties are broken nicely (pointed out by meeks)