Update gemspec. Assign a license and improve summary/description
Updates to Pinner

 - Pinterest changed the structure of the embedded Pinner json.  #embedded_pinner_json has been updated with a regex that supports it
 - Added support for pulling the "about" data
 - Updated pinner spec to use the johnstamosgem test account when testing location/url/about
 - New cassettes due to the embedded json changes… thanks pinterest.
Support Pinterest's recent embedded JS changes.

Fixed the regex and updated cassettes.