Imports of nsinit command

PathSynopsis
encoding/jsonPackage json implements encoding and decoding of JSON as defined in RFC 7159.
github.com/dotcloud/docker/pkg/libcontainer
github.com/dotcloud/docker/pkg/libcontainer/nsinit
io/ioutilPackage ioutil implements some I/O utility functions.
logPackage log implements a simple logging package.
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.
strconvPackage strconv implements conversions to and from string representations of basic data types.