* src/glade-property.[ch], src/glade-widget.[ch]: Added
	  "catalog_default" arg to glade_property_new() and adjusted callers.

	* src/glade-property-class.[ch]: Ensure that there are always
	  ->def and ->orig_def members resolved.

	* src/glade-gtk.c:
	  o GtkBox loading issues fixed.
	  o Removed unused code from: glade_gtk_table_has_child and
	    glade_gtk_table_refresh_placeholders.

	* src/glade-widget.c:
	  o Ignore properties properly when creating the object.
	    (glade_widget_params_from_widget_info and
	    glade_widget_build_object functions)
	  o Use the introspected default value for properties when
	    loading a project. glade_widget_properties_from_widget_info

	* widgets/gtk+.xml.in: Avoid warnings.
	  o Ignore GtkWidget has-default property.
	  o Ignore GtkComboBox active, column-span-column and row-span-column properties.