Imports of rootfs2vhd command

PathSynopsis
bufioPackage bufio implements buffered I/O. It wraps an io.Reader or io.Writer object, creating another object (Reader or Writer) that also implements the interface but provides buffering and some help for textual I/O.
bytesPackage bytes implements functions for the manipulation of byte slices.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/Microsoft/hcsshim/internal/lcow
github.com/Microsoft/hcsshim/internal/uvmThis package describes the external interface for utility VMs.
github.com/Microsoft/hcsshim/internal/wclayerPackage wclayer provides bindings to HCS's legacy layer management API and provides a higher level interface around these calls for container layer management.
github.com/opencontainers/runtime-spec/specs-go
github.com/sirupsen/logrusPackage logrus is a structured logger for Go, completely API compatible with the standard library logger.
github.com/urfave/cliPackage cli provides a minimal framework for creating and organizing command line Go applications.
osPackage os provides a platform-independent interface to operating system functionality.
os/execPackage exec runs external commands.
path/filepathPackage filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.
timePackage time provides functionality for measuring and displaying time.