kLocks

Fixed some bugs. (%prefix% not replaced in the usage message of /unlock & /changecode usage message not working)

Added new option to use arguments instead of "Chat Input" when entering a code. New syntax: (Things in square brackets "[]" mean optional argument) /lock [code] /unlock [code] /changecode [old code] [<new code>] If you type the old code in /changecode, the new code argument will be a requirement!