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