complete backend rotator CRUD operations
complete backend intro, statute, organization, member(nested) CRUD operations
complete backend event, record CRUD operations
add adminNavbar
add bootstrap to navbar, adminNavbar annd footer
solving conflicts in pulling for layout integrate
solving conflicts to merge master & juin_develop in local
Merge branch 'kai_develop' of https://github.com/sunkai612/NTUGSA_site into kai_develop

update new layout