update submodules and documentation

README.md

requirements.yml

roles/apps/k8s-elasticsearch

roles/apps/k8s-fabric8

roles/apps/k8s-heapster

roles/apps/k8s-influxdb

roles/apps/k8s-kube-logstash

roles/apps/k8s-kube-ui

roles/apps/k8s-kubedash

roles/apps/k8s-kubedns

roles/apps/k8s-memcached

roles/apps/k8s-pgbouncer

roles/apps/k8s-rabbitmq