Oops. Made a convenience method… and forgot to use it. :X
Update the SearchScraper and Pin classes to emphasize retrieving data via embedded json when possible instead of scraping the HTML.  This was a result of Pinterest making a lot of changes today and tests with old cassettes actually being broken.

Everything is updated/fixed now.
Update JSON paths and rename `count` to `limit` because that's what it's actually doing… limiting the results returned.
Add support for extracting data about individual Pinners