Enhancement: Download button for the original file

[jaypatel512]

Hey Guys,

I have a sample section that is getting auto-generated with groc. E.g.: http://paypal.github.io/PayPal-PHP-SDK/sample/doc/payments/CreatePaymentUsingPayPal.html

what I wish to have is an ability to have a way where a user could download the appropriate file (.php file). This allows us to just download the file, and get it working.