Imports of package defs

PathSynopsis
encoding/xmlPackage xml implements a simple XML 1.0 parser that understands XML name spaces.
errorsPackage errors implements functions to manipulate errors.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/AzureAD/microsoft-authentication-library-for-go/apps/internal/oauth/ops/authority
github.com/google/uuidPackage uuid generates and inspects UUIDs.
logPackage log implements a simple logging package.
strconvPackage strconv implements conversions to and from string representations of basic data types.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.
timePackage time provides functionality for measuring and displaying time.