Correct typo kuberentes->kubernetes (#58)

This seems to be a common typo, possibly exacerbated by copy-paste
of comment strings. I spotted it in the README.md at first, so I fixed
that and then checked the rest of the code and fixed a few more. They
are all in comments or documentation, so there's no code issue.

FYI, there's still some in the vendor directory, but I haven't fixed
those as they'd get replaced by any new `go get` I think:

$ ack uberentes
vendor/k8s.io/apimachinery/hack/godep-deps.sh
20:# 2. godep restore based on k8s.io/kuberentes provided manifest

vendor/k8s.io/client-go/CHANGELOG.md
120:* Included bug fixes in k8s.io/kuberentes release-1.5 branch, up to

vendor/k8s.io/client-go/kubernetes/fake/register.go
64://     clientsetscheme "k8s.io/client-go/kuberentes/scheme"

vendor/k8s.io/client-go/kubernetes/scheme/register.go
64://     clientsetscheme "k8s.io/client-go/kuberentes/scheme"

Sorry, this isn't the most exciting commit in the world :-(

vkubelet/provider.go

@@ -39,15 +39,15 @@ type Provider interface {
 	Capacity() v1.ResourceList
 
 	// NodeConditions returns a list of conditions (Ready, OutOfDisk, etc), which is polled periodically to update the node status
-	// within Kuberentes.
+	// within Kubernetes.
 	NodeConditions() []v1.NodeCondition
 
 	// NodeAddresses returns a list of addresses for the node status
-	// within Kuberentes.
+	// within Kubernetes.
 	NodeAddresses() []v1.NodeAddress
 
 	// NodeDaemonEndpoints returns NodeDaemonEndpoints for the node status
-	// within Kuberentes.
+	// within Kubernetes.
 	NodeDaemonEndpoints() *v1.NodeDaemonEndpoints
 
 	// OperatingSystem returns the operating system the provider is for.