Moved the development dependencies out of the gemspec and into the Gemfile. WebMock shouldn't be running in the development environment, but it did since it was a development dependency. Moving it to the Gemfile fixed it, since we can define it as just a test dependency and that's what we wanted.
Added the kiva:authorize Rake task, which adds the ability to authorize Kuva (or more specifically the Rails application) to connect to Flickr using the Flickr API.
Let's remove the Kuva::CLI, since we won't be using it anymore because of the kiva:authorize Rake task.