ServerEvents

Primarily a compatibility release to support the upcoming CB 1.1-R5 and above.

• Update to use the new Bukkit event system.
  
• Hopefully, a fix for the rare non-fatal NPEs seemingly caused by the death event object being lost before the death report thread finishes.
  
• Removed the plugin's "loading" and "shutting down" log messages since Bukkit now handles those itself.