Is the SkipDuplicated option judged to be reversed?

[boycs007]

SkipDuplicated ，when the option set false , duplicated content will be skipped.

utils.go

if !opts.SkipDuplicated {
	ignore := checkMD5Sum(path, fileCache)
	if ignore {
		if opts.Debug {
			fmt.Printf("[ignore=%v] find same md5\n", path)
		}
		return nil
	}
}

[hhatto]

ref: #68