Update Stripe donation page to use new method
I've switched over to the new version of Stripe Checkout (a hosted page instead of the old popup version), so this updates the Stripe donation page to use that method instead. The jQuery file isn't used anywhere else, so I can delete it now. This page could (should?) be moved to the main site instead of being on the Docs one, but it doesn't matter much.
Showing with 18 additions and 42 deletions