After upgrade to 4.2.1 how to get "settings" and "screen lock" back in pull down menu?
Swiping down on the left side of the screen should bring down the notification window shade and swiping down on the right side of the screen should bring down the new "quick settings" window shade which has the settings icon and some other handy settings easily available. As far as the screen adjusting, this is known as auto-rotate and can be changed in the quick settings as well (Shown below).

Notification Shade:



Quick Settings Shade: