1.6 : There's no Database.php on my CodeIgniter 1.6 download

[eluser]D3N14M[/eluser]
Okay, I don't know if there has been a change that makes that the Database library has changed place or it's on another philosophy, but I downloaded the new CodeIgniter_1.6.0.zip and there's no Database.php on the libraries folder. Since I didn't updated from a previous version, I don't have the file and the framework crash every time I try to load it.

Has something change or is the file missing on the zip?