* src/glade-catalog.c: Fixed bug in catalog_find_by_name (Luc Simard)

	* src/glade-editor.c: Played around with how properties are dealt with.

	* src/glade-property-class.[ch], src/glade.h: Added "save" and "editable"
	  tags to properties through xml catalog.

	* src/glade-property.[ch], src/glade-types.h:
	  Major revamping of glade-property, now it is a full fledged GObject with
	  class method access & the new "value-changed" signal.

	* src/glade-widget.c: Now g_object_unref the properties instead of
	  glade_property_free, also adjusted arguments for glade_property_write.