Imports of gcstools command

PathSynopsis
encoding/jsonPackage json implements encoding and decoding of JSON as defined in RFC 7159.
flagPackage flag implements command-line flag parsing.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/Microsoft/opengcs/service/gcs/protPackage prot defines any structures used in the communication between the HCS and the GCS.
github.com/Microsoft/opengcs/service/gcsutils/gcstools/commoncli
github.com/Microsoft/opengcs/service/gcsutils/libtar2vhd
github.com/Microsoft/opengcs/service/gcsutils/remotefs
github.com/sirupsen/logrusPackage logrus is a structured logger for Go, completely API compatible with the standard library logger.
github.com/vishvananda/netlinkPackage netlink provides a simple library for netlink.
github.com/vishvananda/netnsPackage netns allows ultra-simple network namespace handling.
logPackage log implements a simple logging package.
netPackage net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets.
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.
runtimePackage runtime contains operations that interact with Go's runtime system, such as functions to control goroutines.