Adds missing swipe directions for iOS plus some minor clean-up of layout in tests.

gameplay/src/PlatformiOS.mm

@@ -570,8 +570,27 @@ int getUnicode(int key);
 {
     if((evt & Gesture::GESTURE_SWIPE) == Gesture::GESTURE_SWIPE && _swipeRecognizer == NULL)
     {
+        // right swipe (default)
         _swipeRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeGesture:)];
         [self addGestureRecognizer:_swipeRecognizer];
+
+        // left swipe
+        UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeGesture:)];
+        swipeGesture.direction = UISwipeGestureRecognizerDirectionLeft;
+        [self addGestureRecognizer:swipeGesture];
+        [swipeGesture release];
+        
+        // up swipe
+        UISwipeGestureRecognizer *swipeGesture2 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeGesture:)];
+        swipeGesture2.direction = UISwipeGestureRecognizerDirectionUp;
+        [self addGestureRecognizer:swipeGesture2];
+        [swipeGesture2 release];
+        
+        // down swipe
+        UISwipeGestureRecognizer *swipeGesture3 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeGesture:)];
+        swipeGesture3.direction = UISwipeGestureRecognizerDirectionDown;
+        [self addGestureRecognizer:swipeGesture3];
+        [swipeGesture3 release];
     }
     if((evt & Gesture::GESTURE_PINCH) == Gesture::GESTURE_PINCH && _pinchRecognizer == NULL)
     {