Enable docker registry cache. By default it is off
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.
gitrepo validation
fixed a minor format problem
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
Merge pull request #2566 from andrewwatson/patch-1

fixed a minor format problem
Merge pull request #2540 from mikedanese/kubectl-example-fix

Fixed kubectl example
Merge pull request #2538 from brendandburns/fix

Increase the verbosity of integration test runs.
Merge pull request #2535 from erictune/move_env

Move service environment vars code.
fixed more typos
Clarify format of service environment variables. Fixes #1936.
Update PD example.