Imports of opencensus command

PathSynopsis
bytesPackage bytes implements functions for the manipulation of byte slices.
contextPackage context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes.
encoding/binaryPackage binary implements simple translation between numbers and byte sequences and encoding and decoding of varints.
flagPackage flag implements command-line flag parsing.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/lightstep/lightstep-tracer-go/lightstepocPackage lightstepoc provides an OpenCensus exporter for sending OpenCensus spans back to LightStep.
go.opencensus.io/tracePackage trace contains support for OpenCensus distributed tracing.
logPackage log implements a simple logging package.
timePackage time provides functionality for measuring and displaying time.