unread added. (#4)
add bootstrap and refactoring sign-in and sign-up views
rename controller and omit email to user model
Merge pull request #17 from DonutWorks/feat/check-reader

unread added. (#4)
Merge pull request #18 from DonutWorks/refactoring-view-with-bootstrap

add bootstrap and refactoring sign-in and sign-up views (#19)
Merge pull request #24 from DonutWorks/refact/import-excel-controller

rename controller and omit email to user model (#21)
#9 resolve conflict