Automatically update upstream versions. Bukkit-1.4.7-R1.0-30-ge416362, CraftBukkit-1.4.7-R1.0-53-g2305e00
Automatically update upstream versions. Bukkit-1.4.7-R1.0-30-ge416362, CraftBukkit-1.4.7-R1.0-54-gff7c371
Stage DataWatcher & WatchableObject.

So that we may identify the exact cause of exceptions originating from these classes.