[bin/crypt] added NoSuchDisk.action
So that the next commit can use it for removing disks, too.
[bin/crypt] implement 'show' command
Coke++ for suggestion.
[bin/crypt] no need to modify $command in-place
Also, we want to work on the lc'd version, in case people decide to WRITE IN
[bin/crypt] implement hanoi CLI client
[crypt.pl -> bin/crypt] rename
Made file u+x too, and added a shebang line. This seems to conform closer to
the Panda ecosystem.