admin panel css
flash messages partial
added Admin/SubjectController
sortable user table
admin/subject#index
deleting subjects from admin panel
refactor old lesson routes and forms
change the form label
admin/subjects#new
admin/subject#edit & update
removed some code & add edit link in admin/subject#index
admin/subject#index css
some comments
delete old files
page titles specs
admin/subject#show
subject/lesson#show
admin/videos#new & create
admin/videos#destroy, edit&update
admin/lessons#edit