put rspec in dev/test gem group
Pull logic out of app.rb and into a wrapper object.
Renamed GrabberPrinter to ConsoleGrabberWrapper

This makes it more clear that it lines up with the
WebGrabberWrapper
Airplane coding causes bugs. Don't do it.
Made web_grabber_wrapper more idempotent.
Add error message for misunderstood circle.
Make it clear that circle name is optional