Add a util.Forever variant that ends on a stop channel
Fixes #2681: update to cadvisor 0.6.2
Make credentialprovider less verbose about benign errors.

In particular, a few of the utilities used within the credentialprovider had the pattern:
   glog.Errorf("while blah %s: %v", s, err)
   return nil, err

This change propagates those error message and puts the burden of logging on the caller.

In particular, this allows us to squelch all output during kubelet startup when we are detecting whether certain credentialprovider plugins should even be enabled.

Fixes: https://github.com/GoogleCloudPlatform/kubernetes/issues/2673
clean up error message on labels validation errs
Add namespacing for label keys
Loosen DNS 952 for labels
Add a test for important URLs.
Document API doc path.
Adding docs for prioritization of issues.
Adding an e2e test for monitoring.
Proper appending of logging.write scope to array
Add a test for important URLs on the apiserver.
Merge pull request #2716 from zulily/fix-gce-provision-with-gcp-logging

Fix GCE scopes when using GCP Logging
Updated readme.md
Merge pull request #2514 from thockin/label-ns

Add label key namespacing
Fix link.
Merge pull request #2723 from erictune/cleanup1

Fix link.
Merge pull request #2706 from vishh/monitoring_e2e

Adding an e2e test for monitoring.
Merge pull request #2507 from MikeJeffrey/docs

Update to readme.md
Create pull-requests.md