The k8s external-dns project now uses the official Kubernetes projects
container registry at k8s.gcr.io. Update all references to use the new
registry.

* Update apiVersions in docs

Update docs to reflect new apiVersions for ingresses and deployments.

* Add selector to apps/v1 deployments

The extensions/v1beta1 API is deprecated for Deployment and with 1.16 is
not served by default anymore. This breaks the examples on k8s 1.16.

See this blog post for details on the deprecations:

https://kubernetes.io/blog/2019/07/18/api-deprecations-in-1-16/

* Add recent changes to the changelog
* Update version in docs
Signed-off-by: Nick Jüttner <nick@zalando.de>

* update RBAC rules in docs

* update docs with split between rbac and non

* make deployment use new sa

* docs: correctly reference service account in CRB

* docs: correctly reference service account in CRB in other docs

* docs(tutorials): add tutorial for digital ocean

* docs(tutorials): fix version used in cloudflare tutorial

* chore: update the changelog with the latest and greatest, thanks to all who contributed