Merge pull request #456 from brendandburns/health

Move health checking logic out to a utility. Add a minion registry that health checks.
Merge pull request #474 from yifan-gu/close_chan

Changed op.notify<-true to close(op.notify).
Add support for CPU limiting to the kubelet.
Merge pull request #479 from brendandburns/cpu

Add support for CPU limiting to the kubelet.
Merge pull request #480 from monnand/cadvisor-update-1

Update kubelet package to use most recent cAdvisor's code
Move logger to own package; clean up apiserver to use serve mux.
add a client to get container info from kubelet
Merge pull request #475 from lavalamp/httpLogger

Move logger to own package; clean up apiserver to use serve mux.
don't reuse random
Merge branch 'master' into fix/golint2

Conflicts:
	pkg/api/types.go
	pkg/health/health_check.go
	pkg/kubelet/kubelet.go
	pkg/kubelet/kubelet_server.go
	pkg/kubelet/kubelet_server_test.go
	pkg/kubelet/kubelet_test.go
Fixes new golint errors in pkg/kubelet after merge
Correct an error message
Fix a build failure of a test
Fixes golint errors in pkg/health
Fixes golint errors in pkg/healthz
Rename a function according to go convention
use correct syntax for alternative value of KUBE_MINIONS
Merge pull request #488 from byxorna/gabe-fix-apiserver-runimage

use correct syntax for alternative value of KUBE_MINIONS
Merge pull request #460 from nyaxt/remove_random

Don't keep rand.Rand inside Master
Merge pull request #464 from yugui/fix/golint2

Fixes Go lint errors