Imports of nk command

PathSynopsis
bytesPackage bytes implements functions for the manipulation of byte slices.
crypto/randPackage rand implements a cryptographically secure random number generator.
encoding/base32Package base32 implements base32 encoding as specified by RFC 4648.
encoding/base64Package base64 implements base64 encoding as specified by RFC 4648.
flagPackage flag implements command-line flag parsing.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/nats-io/nkeysPackage nkeys is an Ed25519 based public-key signature system that simplifies keys and seeds and performs signing and verification.
ioPackage io provides basic interfaces to I/O primitives.
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.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.