refs #710 remove white space
refs #628 bug fix, current_user.cancel -> Cancel
refs #678 add a spec for the tags
refs #626 bug fix
refs #711 fix the design on the header
refs #698 remove the unconfirmed_email over 24 hours
refs #698 add a spec for the deleting some unconfirmed emails
refs #712 add the editing email link to the mypage, and modified button to link
refs #619 delete the current_user's confirmed email
refs #619 add two spec about the deleting the unconfirmed email
refs #620 add the links to resend to the unconfirmed email
refs #620 add two specs for to resend the emails
refs #212 add the categories and breakdowns data with sidekiq
refs #212 set the environment variable for sidekiq
refs #713 add the gem for ruby static code analyzer
refs #714 Prefer single-quoted strings when you don't need string interpolation or special symbols.
refs #715 Redundant self detected.
refs #716 Keep a blank line before and after private.
refs #717 Use only ascii symbols in comments.
refs #718 Missing top-level class documentation comment.