#10 article model 수정
Merge pull request #11 from mjy0503/dev/board

 #10 article model 수정
 #13 layout html 작성
 #13 layout 간단한 css 작성
 #13 layout css 추가
Merge pull request #14 from mjy0503/feat/layout

Feat/layout
Merge branch 'dev/board' of github.com:sparcs-kaist/zabo into feat/view