Added multicraft shutdown support

Added the option for the server to shut down completely and not restart as it otherwise would have done if run under multicraft.
Added multicraft option in Value class
Loading multicraft option from config
Last multicraft spesific bits

Just some logging and stuff. Also adding config.yml and plugin.yml as
those were not in the repo.
Merge pull request #1 from Erbros/master

Multicraft spesific shutdown.