Bukkit/CraftBukkit — pull request #683 by TomyLobo (2012-02-25 13:53:11+00:00)
Title: CraftSign changes

- Removed the useless world field.
- Made it so changes to a CraftSign no longer reflect into the world without calling sign.update().

Rationale:
CraftSign is a Block*State*, which means it represents the state of the block at the time the snapshot was taken.