added unit price to the order_details

- It is irrelevant now as the price is 0 for everything but just wanted
to have it there
Order search and display

- Added code for searching orders by id and displaying order details
- Wrote model for fetching all the orders by email. Rendering not done
yet.
- Updated routes to the order pages
Typo and bug fix

- Corrected form name on customer info form
- Added title to the order placed page
Enabled XSS filtering