Better error message if binary does not exist
Better error message if binary does not exist

warmchang/minikube,dalehamel/minikube,warmchang/minikube,kubernetes/minikube,kubernetes/minikube,kubernetes/minikube,kubernetes/minikube,kubernetes/minikube,warmchang/minikube,warmchang/minikube,warmchang/minikube,warmchang/minikube,warmchang/minikube,dalehamel/minikube,kubernetes/minikube,dalehamel/minikube,kubernetes/minikube