title: Barcode EAN-13 to binary
body: <p>I need create byte array from EAN-13 digits.
  How I understend, here is description: <a href="http://en.wikipedia.org/wiki/International_Article_Number_%28EAN%29#Binary_encoding_of_data_digits_into_EAN-13_barcode" rel="nofollow">http://en.wikipedia.org/wiki/International_Article_Number_%28EAN%29#Binary_encoding_of_data_digits_into_EAN-13_barcode</a></p>
  
  <p>Maybe someone already created this algorithm? Please share.</p>