show all Users
Merge pull request #7 from nguyenvancanh/showUser

Show user
Admin view, edit, delete words
Merge pull request #8 from nguyenvancanh/adminAndWords

Admin view, edit, delete words
Admin view, edit, delete category
Merge pull request #9 from nguyenvancanh/adminAndCategory

Admin view, edit, delete category
User edit profile and change password