Add method to read all remaining bytes from PatchJPEGLSImageInputStream to OutputStream

[gunterze]

    /**
     * Reads all bytes from this image input stream and writes the bytes to the given output stream. This method
     * does not close either stream.
     *
     * @param out the output stream, non-null
     * @return the number of bytes transferred
     * @throws IOException if an I/O error occurs when reading or writing
     * @throws NullPointerException if out is {@code null}
     */
    public long transferTo(OutputStream out) throws IOException {..}