Actor has one job - ensure that a public repo exists at the specified address
Inheritance: ReceiveActor
 private void ForwardTo( IActorRef sender, GithubValidatorActor.InvalidRepo repo )
 {
     sender.Forward( repo );
 }
 private void SendInvalidRepo( IActorRef sender, GithubValidatorActor.InvalidRepo invalidRepo )
 {
     sender.Tell( invalidRepo );
 }