Fix 32bit build
Remove never-needed return value.

Make some types private.
Enable docker registry cache. By default it is off
Merge pull request #2527 from erictune/cleanup2

Remove unused return value.  Make stuff private.
kubectl get format is specified with -o, not -f
Increase the verbosit of integration test runs.
Display node label
fix typo
Typo fix
reset err value to SetDeadline return
Move service enviroment vars code.

GetServiceEnvironmentVariables (originally in  pkg/registry/service/rest.go)
is split into two parts: one that lists services, and one that turns
a ServiceList into environment vars.  This will allow a subsequent PR
to add a call to the latter function with an existing ServiceList.
The former part is moved into pkg/registry/pod/bound_pod_factory.go.
The latter part is put in a new package, pkg/kubelet/envvars/envvars.go.
The new package is under kubelet because the container enviroment is more
associated with kubelet than with registry.
Test code moved too.
added healthz check to the proxy with configurable port
Do not use nginx image in e2e test
fixed a minor format problem
Merge pull request #2531 from jbeda/32bit-fix

Fix 32bit build
Merge pull request #2520 from mikedanese/proxy-healthz

add health check to kube-proxy
Merge pull request #2555 from erictune/cleanup4

Do not use nginx image in e2e test
Merge pull request #2551 from meirf/set-error-to-set-deadline-call

reset err value to SetDeadline return
Merge pull request #2550 from komljen/master

Typo fix
Merge pull request #2547 from ddysher/show-node-label

Display node label