Made easy instructions for Korean. (한국어 간편 사용설명서 제작)

[im-hjk]

I found this project very useful, but hard to use for non-english speakers. So I made rough user guide for other Korean fellows.

간단하게 한국어 사용설명서를 만들었습니다.

https://github.com/im-hjk/coffeegrindsize