Add WillPaginate Config per_page is 20
Add Scheduler rake task for staff leave
Refactor Admin::BaseController and Admin::FeedbackController
Remove 10 leaves per staff test
Revise coding style
Refactor OmniauthCallbacksController
Revise set start_time and end_time leave
Remove method eql? in User Model
Remove gem bussiness_time
Revise set start_day and end_day leave
Remove gem bussiness_time
Update seed
Remove cumulateive leaves staff