code: public static void encode(InputStream in, OutputStream out) throws IOException {
      encode(in, out, true);
    }
docs: Encode data from the InputStream to the OutputStream in Base64. Line breaks are inserted every
  76 characters in the output.
  
  @param in Stream from which to read data that needs to be encoded.
  @param out Stream to which to write encoded data.
  @throws IOException if there is a problem reading or writing.
  @since ostermillerutils 1.00.00