Imports of package functional

PathSynopsis
github.com/Microsoft/hcsshim/functional/manifest
github.com/Microsoft/hcsshim/internal/hcs
github.com/Microsoft/hcsshim/internal/hcsoci
github.com/sirupsen/logrusPackage logrus is a structured logger for Go, completely API compatible with the standard library logger.
osPackage os provides a platform-independent interface to operating system functionality.
os/execPackage exec runs external commands.
strconvPackage strconv implements conversions to and from string representations of basic data types.
timePackage time provides functionality for measuring and displaying time.