Imports of clientexample command

PathSynopsis
flagPackage flag implements command-line flag parsing.
github.com/golang/glogPackage glog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup.
github.com/google/cadvisor/clientThis is an implementation of a cAdvisor REST API in Go.
github.com/google/cadvisor/info/v1Types used for docker containers.