items now fall by gravity... also some other random updating

src/mapblockobject.cpp

@@ -17,6 +17,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
+// This file contains the DEPRECATED MapBlockObject system
+
 #include "mapblockobject.h"
 #include "mapblock.h"
 // For object wrapping