Imports of vet command

PathSynopsis
bytesPackage bytes implements functions for the manipulation of byte slices.
cmd/internal/objabi
cmd/vet/internal/cfg
cmd/vet/internal/whitelist
encoding/gobPackage gob manages streams of gobs - binary values exchanged between an Encoder (transmitter) and a Decoder (receiver).
encoding/jsonPackage json implements encoding and decoding of JSON as defined in RFC 7159.
errorsPackage errors implements functions to manipulate errors.
flagPackage flag implements command-line flag parsing.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
go/astPackage ast declares the types used to represent syntax trees for Go packages.
go/buildPackage build gathers information about Go packages.
go/constantPackage constant implements Values representing untyped Go constants and their corresponding operations.
go/importerPackage importer provides access to export data importers.
go/parserPackage parser implements a parser for Go source files.
go/printerPackage printer implements printing of AST nodes.
go/tokenPackage token defines constants representing the lexical tokens of the Go programming language and basic operations on tokens (printing, predicates).
go/typesPackage types declares the data types and implements the algorithms for type-checking of Go packages.
ioPackage io provides basic interfaces to I/O primitives.
io/ioutilPackage ioutil implements some I/O utility functions.
osPackage os provides a platform-independent interface to operating system functionality.
path/filepathPackage filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths.
reflectPackage reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types.
regexpPackage regexp implements regular expression search.
sortPackage sort provides primitives for sorting slices and user-defined collections.
strconvPackage strconv implements conversions to and from string representations of basic data types.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.
unicodePackage unicode provides data and functions to test some properties of Unicode code points.
unicode/utf8Package utf8 implements functions and constants to support text encoded in UTF-8.