BUG FIXES
=========

return.php
- Must check receipt date (cannot be more than 15 days old).


registration.php
- Change page title
- remove js function


nav.php
- Show all menu options at all times, except Register and Login when a customer is logged in, and logout when a no one is logged in


checkout.php
- Echo receiptId as well as estimated delivery date


index.php
- Create this