Imports of gomtree command

PathSynopsis
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/sirupsen/logrusPackage logrus is a structured logger for Go, completely API compatible with the standard library logger.
github.com/urfave/cli/v2Package cli provides a minimal framework for creating and organizing command line Go applications.
github.com/vbatts/go-mtree/cmd/gomtree/cmd
osPackage os provides a platform-independent interface to operating system functionality.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.