Bukkit

- Added softmute functionality to /ignored whispers
- If recipient has /ignored the sender, the sender gets a "softmute" message.
- If sender has ignored recipient, the sender is told that they need to /unignore the player first before sending a whisper.
- Code refactoring
- Potential compatibility with plugins that block /plugin:command syntax. If this does not appear to be the case, let me know what plugin it is!