title: Android plugin for Eclipse (ADT) disappears after SDK 20 upgrading
body: <p>I've just upgraded to the Android SDK rev 20 and since then no way to install the ADT plugin in Eclipse 3.7.2. Although the package (Android DDMS, Android Development Tools) is referenced in the Eclipse installed software, I don't have shown-up any Android project or perspective, at the point that I can't set the SDK path in Windows/Preferences ...
  I've also tried to re-install, nada. Accessory: Linux Ubuntu 12.04
  Thanks for help!</p>