new CE 0.16 <includes/definitions/os.inc.php> missing

Dear All,

I've just updated to the new CE version 0.16, and, I was trying to add a new OS like I did on the previous CE version, by following the link:

http://www.observium.org/docs/developing/add_os/

My problem is, on the new CE version, the file:
<includes/definitions/os.inc.php>
is no longer there.

Please, update the online documentation for the new version, and let me know how to add a new OS type on CE 0.16

Best regards,
Sergio Fernandes