func DecodeToTempFile(name string) (path string, err error)
DecodeToTempFile decodes the named file to a temporary location. If successful, it returns the path of the decoded file. The caller is responsible for ensuring that the temporary file is removed.
func ReadFile(name string) ([]byte, error)
ReadFile reads the named file and returns its decoded contents.
func Rot13(data []byte) []byte
Rot13 returns the rot13 encoding or decoding of its input.