- Activated debug and orientation management in Android manifest

- Coded double-click and orientation change for Android
- Clean up debug code badly introduced in opengl code in r3529
- updated Qt project to link against boost on linux

projects/mtg/Android/AndroidManifest.xml

@@ -3,8 +3,9 @@
       package="org.libsdl.app"
       android:versionCode="1"
       android:versionName="1.0">
-    <application android:label="@string/app_name" android:icon="@drawable/icon">
+    <application android:label="@string/app_name" android:icon="@drawable/icon" android:debuggable="true">
         <activity android:name="SDLActivity"
+                  android:configChanges="orientation"
                   android:label="@string/app_name">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
@@ -12,4 +13,5 @@
             </intent-filter>
         </activity>
     </application>
+    <uses-sdk android:minSdkVersion="4" />
 </manifest>