Bukkit

Implemented programmable signs.

A lot of the stuff I added has nothing to do with signs, or ranks, (maybe the plus part)
- Added option to evaluate chat messages (replace-chat: true)
- You can evaluate chat messages per player (replace-chat: "{display}&f: ") - You need to set what the chat looks like.
- For loops now work properly
- Functional place holders now work
- You can schedule tasks in game
- You can now have temporary signs (i.e you loose whatever you bought after a set time)
[ put for example 1 day, or 15s or 9 weeks, 4hr etc. ]

I will document everything shortly.

- Centralized /all, /player, /eval, /execute, /if, programmable signs, and the awesome chat functionality to all run off the same logic

Lots of features aren't fully implemented (e.g. programmable signs is lacking a bit of functionality)