<activity
      android:name="com.example.kata1.MainActivity"
      android:label="@string/app_name" 
      android:screenOrientation="landscape">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>

android:screenOrientation    =     ["unspecified" | "behind" |
                   "landscape" | "portrait" |
                   "reverseLandscape" | "reversePortrait" |
                   "sensorLandscape" | "sensorPortrait" |
                   "userLandscape" | "userPortrait" |
                   "sensor" | "fullSensor" | "nosensor" |
                   "user" | "fullUser" | "locked"]