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....
Merge branch 'rename-to-kube' of https://github.com/eparis/kubernetes into eparis-rename-to-kube

* 'rename-to-kube' of https://github.com/eparis/kubernetes:
  rename kube server binaries to kube-

Conflicts:
	docs/salt.md
Merge branch 'eparis-rename-to-kube'

* eparis-rename-to-kube:
  rename kube server binaries to kube-