Merged in feature/s3integration (pull request #47)

Set Up S3 integration

* cfginterfaceandfirsts3funcs

* addlocalstack

* generallypassesfullsuite

* addedmultipleattemptedpings

* cleanup

* stabiliseplusskip

vendor/github.com/moby/sys/user/user.go

@@ -197,7 +197,6 @@ func ParseGroupFilter(r io.Reader, filter func(Group) bool) ([]Group, error) {
 		for {
 			var line []byte
 			line, isPrefix, err = rd.ReadLine()
-
 			if err != nil {
 				// We should return no error if EOF is reached
 				// without a match.