Changed to using code block instead of blockquote for add-hook example.
Shout-out to Stack Overflow. Not like they need *my* props, but respect is due.
Implemented #'aff-make-itunes-link, stubs for #'aff-make-apple-appstore-link, #'aff-make-amazon-link, #'aft-dissect-amazon-url, and #'aff-dissect-apple-appstore-url.
Implemented #'aff-dissect-itunes-url. More big fiddly regexes.