Add glide.yaml and vendor deps

vendor/k8s.io/kubernetes/build-tools/kube-dns/README.md

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+# DNS in Kubernetes
+
+Kubernetes offers a DNS cluster addon, which most of the supported environments
+enable by default. The source code is in [cmd/kube-dns][kube-dns].
+
+The [Kubernetes DNS Admin Guide][dns-admin] provides further details on this plugin.
+
+[kube-dns]: https://github.com/kubernetes/kubernetes/tree/master/cmd/kube-dns
+[dns-admin]: http://kubernetes.io/docs/admin/dns/
+
+## Making Changes
+
+The container containing the kube-dns binary needs to be built for every
+architecture and pushed to the registry manually whenever the kube-dns binary
+has code changes. Every significant change to the functionality should result
+in a bump of the TAG in the Makefile.
+
+Any significant changes to the YAML template for `kube-dns` should result a bump
+of the version number for the `kube-dns` replication controller and well as the
+`version` label. This will permit a rolling update of `kube-dns`.
+
+[![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/build-tools/kube-dns/README.md?pixel)]()