WIP: rename kube server binaries to kube-

apiserver becomes kube-apiserver
controller-manager -> kube-controller-manager
scheduler and proxy similarly.

Only thing I promise is that right now hack/build-go.sh and
build/release.sh exit with 0.  That's it.  Who knows if any of this
actually works....
I'm not a fan of doing the rename in place-bins.  Can we instead rename the `cmd/*` targets?  I know it might make this bigger but I think it'll reduce confusion in the future.