ignored paypal_sandbox.php
added the paypal library
initial paypal model and defined create function
defined view function for paypal model
defined view_where function for paypal model
defined select function for paypal model
defined select_where function for paypal model
defined delete function for paypal model
initial paypal controller and defined constructor function
defined subscribe function for paypal controller
created route for paypalc/subscribe/<id> method of paypal controller
craeted route for paypalc/notify/<id> in paypal controller
defined select_where function for whitepaper controller
defined notify function for paypal controller
did some major modifications to make the paypal thing work :)
defined  and return it as json in view function of subscription controller
used whitepaperCode instead of whitepaperID
wrap the exact links with the right href for links inside subsciptions box in user dashboard
added logo required for paypal
changed logo and redirect to 404 if there exists not post data