Explicitly set the background to black

Once we set the targetSdkVersion to something current, the default theme
background becomes a gradiant, which we don't want.
AndroidManifest.xml:  Set targetSdkVersion to 14

Set targetSdkVersion to 14 to prevent showing the legacy overflow button
on Android 4.0 and higher.

http://android-developers.blogspot.com/2012/01/say-goodbye-to-menu-button.html