Imports of package layer

PathSynopsis
archive/tarPackage tar implements access to tar archives.
bytesPackage bytes implements functions for the manipulation of byte slices.
compress/gzipPackage gzip implements reading and writing of gzip format compressed files, as specified in RFC 1952.
encoding/jsonPackage json implements encoding and decoding of JSON as defined in RFC 7159.
errorsPackage errors implements functions to manipulate errors.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/Sirupsen/logrus
github.com/docker/distributionPackage distribution will define the interfaces for the components of docker distribution.
github.com/docker/distribution/digest
github.com/docker/docker/daemon/graphdriver
github.com/docker/docker/pkg/archivePackage archive provides helper functions for dealing with archive files.
github.com/docker/docker/pkg/idtools
github.com/docker/docker/pkg/ioutils
github.com/docker/docker/pkg/plugingetter
github.com/docker/docker/pkg/stringidPackage stringid provides helper functions for dealing with string identifiers
github.com/vbatts/tar-split/tar/asmPackage asm provides the API for streaming assembly and disassembly of tar archives.
github.com/vbatts/tar-split/tar/storagePackage storage is for metadata of a tar archive.
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.
regexpPackage regexp implements regular expression search.
strconvPackage strconv implements conversions to and from string representations of basic data types.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.
syncPackage sync provides basic synchronization primitives such as mutual exclusion locks.