* src/glade-editor-property.c: Added GLADE_TYPE_EPROP_OBJECT (object properties)

	* src/glade-parser.[ch]:
	  o Exported new function: glade_parser_pvalue_from_winfo()
	  o Removed duplicate implementation of alloc_string & alloc_propname

	* src/glade-project-view.c: Will display toplevel widgets which are not
	  nescisarily GtkWidgets.

	* src/glade-project.c, src/glade-widget.c: Implemented a kick-start so
	  that object properties are loaded/looked up after the whole project
	  is finished loading.
	  (glade-widget.c: Added glade_widget_has_decendant)

	* src/glade-property-class.[ch]:
	  o Added object support to glade_property_class_make_gvalue_from_string &
	    glade_property_class_make_string_from_gvalue
	  o Added glade_property_class_is_object, glade_property_class_make_gvalue_from_vl &
	    glade_property_class_set_vl_from_gvalue.

	* src/glade-property.[ch]:
	  o Added documentation
	  o Added glade_property_equals_value, glade_property_equals_va_list & glade_property_equals


	* src/glade-gtk.c: Removed unneeded radio button "group" property support
	  (handled genericly as an object property)

	* widgets/gtk+.xml.in: Disabled alot of irrelevent object type properties,
	  removed the custom "group" property on radio buttons.