Implement clean shutdown

- increase version number to 1.6.1

java/com/drbeef/lambda1vr/GLES3JNIActivity.java

@@ -67,7 +67,11 @@ import static android.system.Os.setenv;
 	private SurfaceView mView;
 	private SurfaceHolder mSurfaceHolder;
 	private long mNativeHandle;
-	
+
+	public void shutdown() {
+		System.exit(0);
+	}
+
 	@Override protected void onCreate( Bundle icicle )
 	{
 		Log.v( TAG, "----------------------------------------------------------------" );
@@ -578,7 +582,7 @@ import static android.system.Os.setenv;
 		Log.v( TAG, "GLES3JNIActivity::onStart()" );
 		super.onStart();
 
-		GLES3JNILib.onStart( mNativeHandle );
+		GLES3JNILib.onStart( mNativeHandle, this );
 	}
 
 	@Override protected void onResume()

java/com/drbeef/lambda1vr/GLES3JNILib.java

@@ -10,7 +10,7 @@ public class GLES3JNILib
 {
 	// Activity lifecycle
 	public static native long onCreate( Activity obj, String commandLineParams );
-	public static native void onStart( long handle );
+	public static native void onStart( long handle, Object obj );
 	public static native void onResume( long handle );
 	public static native void onPause( long handle );
 	public static native void onStop( long handle );