Merge pull request #504 from bogdando/rework_dnsstack

docs/dns-stack.md

docs/figures/dns.png

inventory/group_vars/all.yml

roles/dnsmasq/tasks/dnsmasq.yml

roles/dnsmasq/tasks/main.yml

roles/dnsmasq/tasks/resolvconf.yml

roles/dnsmasq/templates/01-kube-dns.conf.j2

roles/dnsmasq/templates/dnsmasq-ds.yml

roles/kubernetes-apps/ansible/templates/kubedns-rc.yml

roles/kubernetes/node/defaults/main.yml

roles/kubernetes/node/templates/kubelet.j2