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).
Update for MC 1.5
Prepare nmsblock classes for 1.5, using potential Craftbukkit package names (nothing in nms changed, as usual)