Patch: Detecting mobile devices other than iPhone

For a project I needed to detect other mobile devices than iPhone.
Themekey can't do this yet so i decided to create a patch.

This patch detects the following:

System: user_os -> Blackberry, Android, iPad, Symbian, WebOs
System: user_browser_simplified -> Blazer, Fennec, Maemo

I hope this patch comes in the next release