SL(1): Cure your bad habit of mistyping

SL (Steam Locomotive) runs across your terminal when you type "sl" as you meant to type "ls". It's just a joke command, and not useful at all.

Name		Name	Last commit message	Last commit date
Latest commit History 32 Commits
.gitignore		.gitignore
LICENSE		LICENSE
Makefile		Makefile
README.ja.md		README.ja.md
README.md		README.md
demo.gif		demo.gif
sl.1		sl.1
sl.1.ja		sl.1.ja
sl.c		sl.c
sl.h		sl.h

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