Create Integration specs to validate the whole system works
* Created PetfinderManager features and implementation. Testing
  fetching, storing and updating of cats and dogs for shelter with :x
  id
* Started wiring shelter API
* Fixed Pet.rb model. Forget to add :on_before_callback
* Fixed petfinder_connection_spec. JSON.prase is now done in Connection
* Configured VCR and Mock to allow outside connection if :vcr => off
* Removed spec :focus, so all tests run when called