Pinterest is now delivering search results in batches of 25 instead of 50.

This broke the tests but the implementation is still good.  Tests/cassettes have been updated.  If this isn't a one time thing and Pinterest dials the pagination count up/down in the future…  I'll rewrite the 3 impacted tests using a different approach.
Refactor the Client class' ability to make connections to Pinterest.

Broke things out into individual (private) methods to isolate some of the "complexity" and improve the test suite.