VCR related updates

- changed VCR's config so that cassettes are not automatically overwritten.  It's easy to clutter commits with updated cassettes when 'just by chance' they were updated instead of a deliberate re-pull of all requests
- harded coded a timestamp used in some requests by the pin searcher.  previously, this has been set to the current time but because nothing is cached on the client side it shouldn't be a problem AND has the nice benefit of making the requests no longer have unique URLs… so VCR can cleanly record them.
update gemspec to include proper versions.