Imports of gen command

PathSynopsis
bytesPackage bytes implements functions for the manipulation of byte slices.
logPackage log implements a simple logging package.
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.