Revert "Made //undo and //redo disregard global masks."
This does nothing and neither did the original code. Disregard previous notice.
This reverts commit cfb19eba9b5167ec1267791e5d8e8fe358acdc26.
Use actual data for skull blocks
Fixed WORLDEDIT-2717, max-blocks-changed . maximum overriden by default

min(default_limit, max_limit) meant that the max limit was really default_limit when the default was less than the max
More lasting fix for Spout constantly causing issues. (This is not the first time this has happened).
Updated BukkitWorld NMS fields to be static.

This prevents attempts at loading the proper NMS compatibility classes from occurring more than once.
Update for MC 1.5
Prepare nmsblock classes for 1.5, using potential Craftbukkit package names (nothing in nms changed, as usual)