Redirect from Quantity Fee Enroll when there's no Quantity Fee based fee. Closes #113
Redirect when no subject available

When a user go to Quantity Fee setup form page, Tueetion will direct
him to subject form page
Dispay alert when no student found

When a user requested a public page of an invalid student, display a
proper message explaining the problem
Hide navbar when viewing public bill
Paginate and sort by created at desc for admin's centers and users