kLocks v1.2

Changed en.yml "CROUCH" to "<key:key.sneak>" which shows the control of the player;
Added admin utilities like "/klocks forceunlock" and "/klocks getcode";
Added configuration options for togling Lockable Invulnerability

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!