not sure if this is a good pattern for decoupling the pod_controller from the node controller..

Need to start DRYing up the registry code, this is terrible.

InstanceProvider should implement node.PodLifecycleHandler.

make this configurable.

make this configurable.

make this configurable.

modified for testing.

See https://github.com/Azure/azure-sdk-for-go/blob/master/README.md for more info on SDK login credentials.

The ControllerManager was created to make the interaction between leader election and controllers easier.

Kubelet stores kubelet-specific configuration such as capacity and labels.

ServerConfigFile stores the parsed json from provider.yaml.

ActivePods type allows custom sorting of pods so a controller can pick the best ones to delete.