2004-03-09  Joaquin Cuenca Abela  <e98cuenc@yahoo.com>

	* src/glade-property.c (glade_property_write): write properties that
	have a default value of NULL.
	* src/glade-project.c: micro-manage the new names of widgets. As soon
	as a new slot is available (for instance, if you change the name
	of button3, then button3 becomes available) its used for a new
	widget.
	* src/glade-project.c (glade_project_dispose, glade_project_finalize):
	implement dispose and finalize methods for GladeProject.
	* src/glade-id-allocator.[ch]: code to manage the ids availables for
	widgets. Code from Owen Taylor.