Updating
Removing unused files
Create index page for listing students
Create dumping data for students
Create function for multiple deletes students
Create page for creating new student
Create function for editing student
Create function for updating student
 Create table teachers
Create index page for listing teachers
Create dump data for teachers table
Fixing the link in list teachers
Create function for deleting teacher
Create page for creating teacher
Create page for editing teacher
Create function for updating teacher