Imports of package saver2v1

PathSynopsis
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/spdx/tools-golang/spdxPackage spdx contains references to the latest spdx version
ioPackage io provides basic interfaces to I/O primitives.
sortPackage sort provides primitives for sorting slices and user-defined collections.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.