Imports of package metrics

PathSynopsis
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/golang/glogPackage glog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup.
github.com/google/cadvisor/info/v1Types used for docker containers.
github.com/prometheus/client_golang/prometheusPackage prometheus is the core instrumentation package.
regexpPackage regexp implements regular expression search.
timePackage time provides functionality for measuring and displaying time.