Advanced RCON: Command output is sent to the RCON client.

RCON authentication is now required before executing commands.
Console command handlers now return two values, bool (IsHandled) and string (CommandOutput).
API change: removed cRoot:ExecuteConsoleCommand(), added cRoot:QueueExecuteConsoleCommand().
API change: removed cPluginManager:ExecuteConsoleCommand(), use cRoot:QueueExecuteConsoleCommand() instead

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1631 0a769ca7-a7f5-676a-18bf-c427514a06d6