Minor: add alias for Command_Block (minecraft name) = Command (official Bukkit name)
Add: support for "ZOMBIE~" meaning any zombie with no customname, and "ZOMBIE~*" meaning a zombie with any customname (except blank)
Add: support for named chests & command-blocks as targets.

Eg.
  CHEST~Fred:
  - action: leftclick
    message: "This is an chest named fred."