A new command for signs. Refreshing them, cleaning them, and verifying
them. Changed up some internal apis, if you were using them sorry for
breaking it. Also, really update the signs when we jail someone who is
offline via a new event.
Right now, the first option of the jail command completes and checks for
proper permission and all that good stuff. Good way to get started with
commands but that's all that has been completed right now.
Plan is that the command interface will get a tabComplete method which
all the classes that implement it will handle. Then if a tabComplete
happens on that command we'll let the command handle it, so the command
handlers don't get cluttered.
The variables possible are:
* %player% - the player's last known name
* %uuid% - the player's uuid, or what can fit on a sign
* %reason% - the reason the player was jailed
* %jailer% - the person/thing who jailed this player
* %afktime% - the amount of time the player has been afk
* %timeinminutes% - the amount of remaining time the player has in
minutes
If the player is jailed forever, then it pulls from the language file
`jailedforeversign` property.
Unless the player has admin permission. This does not include the
penalties as those will be done in a future commit. This also has a
little better performance on the block placing and breaking events, if
these checks are disabled.
