verify the v1beta3 yaml files all work; merge the yaml files

AWS: make it possible to disable minion public ip assignment

kubelet: Add container runtime option for rkt.

kubelet/container: Move pty*.go to container runtime package.

Ease building kubelet image

Fix typos in different config comments

Update cAdvisor dependency.

This makes the labeld pty wrapper available for both container runtime.

Add control variables to Jenkins E2E script

Check node status as part of validate-cluster.sh.

Add old endpoint cleanup function

kubelet/rkt: Remove build label.

Support recovery from in the middle of a rename.

Update Exec and Portforward client to use pod subresource

- Better handling of time-based queries
- Better handling of errors detecting machine topology

Fixes #7906

Use the full hostname for mirror pod name.

Added NFS to PV structs

As we removed the linux specific dependency, now rkt can be built
on other platforms as well.

Adds a simple release-note builder that scrapes the Github API for recent PRs

Revert "kubelet: Add container runtime option for rkt."

This change appends the full hostname to the mirror pod name (instead of taking
the first token) so that if the hostname is overriden, we'd not be creating
unncessary name conflicts. An example would be that a user overrides the
hostnames to be "127.0.0.1" and "127.0.0.2", and both of them were resolved to
"127" for the mirror pod name suffix.

Also, because `uname -n` could return a FQDN or not, this change takes only
the first token of it as the hostname for consistency.

Fix environment variable error in Vagrant docs

kubelet: Add container runtime option for rkt.

Fix environment variable error in Vagrant docs: `KUBERNETES_MASTER_MINION` -> `KUBERNETES_MINION_MEMORY`.

update service.json in persistent-volume example to v1beta3

update mysql-wordpress example to use v1beta3 API

Update examples/meteor to use API v1beta3

JSON struct tags are used as parameter names, fields that do not have
the omitempty marker are always included.