Imports of audit-proxy command

PathSynopsis
io/ioutilPackage ioutil implements some I/O utility functions.
k8s.io/apimachinery/pkg/runtimePackage runtime defines conversions between generic types and structs to map query strings to struct objects.
k8s.io/apimachinery/pkg/runtime/serializer/json
k8s.io/apiserver/pkg/apis/audit/installPackage install installs the experimental API group, making it available as an option to all of the API encoding/decoding machinery.
k8s.io/apiserver/pkg/apis/audit/v1
k8s.io/apiserver/pkg/auditTODO: Delete this file if we generate a clientset.
logPackage log implements a simple logging package.
net/httpPackage http provides HTTP client and server implementations.
osPackage os provides a platform-independent interface to operating system functionality.