Fix panic if selector uses malformed syntax

Fix e2e invalid JSON, ensure CLI communicates invalid JSON errors effectively

Remove a duplicate 'its'

Passing zero objects to create should be an error

eliminate possibility of double-calling

Basic "Run" command

Switch the ignore stream errors behavior to print a Warningf on
failure to parse, not v(2)

Will allow more debugging output to be available in CLI

Deflake pd.sh: Try really, really hard to detach and delete PD

Address nits from PR #3423

Fix streaming YAML from STDIN in kubectl

Add both JSON and YAML STDIN tests in test-cmd

Will be moved upstream soon

Make data dirs for all pods when syncing

hack/test-cmd.sh can be easier to read if we set PATH

Remove unnecessary loop.

Upgrade from gopkg.in/v2/yaml to gopkg.in/yaml.v2 everywhere

instead of using a replacement var.  Makes cut and paste testing
easier.

Fix broken hack/cluster-validate.sh because output-versions were not locked

Add more guards against bad behavior.  A follow up commit will ensure that
when the flags for api-version are specified, they default to the correct
values that client.SetKubernetesDefaults would use.

Split up kubelet "source seen" logic

Allow delete to work from directories and multiple sources

Filter out unhealthy node in scheduler

add kubectl config