[aws-doc-update] docker image version and new arg aws-zone-type (#371)
[aws-doc-update] docker image version and new arg aws-zone-type (#371)

* [aws-doc-update] docker image version and new arg aws-zone-type

* changes after review

* remove annotation for ingress

* docs: modify docs according to suggestions

kubernetes-incubator/external-dns,kubernetes-incubator/external-dns