Merge branch 'master' of https://github.com/SugimotoSohei/botti
Merge branch 'master' of https://github.com/SugimotoSohei/botti
Merge branch 'master' of https://github.com/SugimotoSohei/botti
refactoring
Merge pull request #28 from HAYASAKA-Ryosuke/refactoring

Refactoring