Merge pull request #591 from kubernetes-incubator/etcdtls

docs/ha-mode.md

inventory/group_vars/all.yml

roles/download/defaults/main.yml

roles/etcd/defaults/main.yml

roles/etcd/files/make-ssl-etcd.sh

roles/etcd/handlers/main.yml

roles/etcd/tasks/check_certs.yml

roles/etcd/tasks/configure.yml

roles/etcd/tasks/gen_certs.yml

roles/etcd/tasks/main.yml

roles/etcd/tasks/pre_upgrade.yml

roles/etcd/tasks/refresh_config.yml

roles/etcd/templates/deb-etcd-docker.initd.j2

roles/etcd/templates/deb-etcd-proxy-docker.initd.j2

roles/etcd/templates/deb-etcd-proxy-host.initd.j2

roles/etcd/templates/etcd-docker.service.j2

roles/etcd/templates/etcd-proxy-docker.service.j2

roles/etcd/templates/etcd-proxy-host.service.j2

roles/etcd/templates/etcd-proxy.j2

roles/etcd/templates/etcd.j2