Merge pull request #4 from xymz/master

:100:
Update README.md
Merge pull request #5 from xymz/master

오타 수정
Merge pull request #6 from xymz/master

Attachment 기능을 이용한 issue router message formatting 강화
Merge pull request #7 from xymz/master

Resolved https://github.com/spoqa/dodo/issues/1190