Does not compile since bukkit-1.1-R5

Since Bukkit 1.1 R5 the classes org.bukkit.util.config.Configuration and org.bukkit.util.config.ConfigurationNode have been removed.
This makes it impossible to compile this plugin on the newer bukkit releases.

See as this is more of an api any changes would affect lot's of plugins.
I tried to fix this myself but am not sure where to start.
