Merge pull request #1 from a-ono/master

pull upstream master
Merge pull request #2 from a-ono/master

pull upstream head
Merge pull request #3 from a-ono/master

fixes #90 Added s tag to allowed_tags
Merge pull request #4 from a-ono/master

Pull upstream
Add Korean Translation
Merge pull request #94 from jongha/Korean-Translation

Add Korean translation