Adds SpriteBuilder support for rotational skew

Former-commit-id: 3d3e930

Author: vlidholt

cocos2d-ui/CCBReader/CCBAnimationManager.m

@@ -147,11 +147,11 @@ - (CCActionInterval*) actionFromKeyframe0:(CCBKeyframe*)kf0 andKeyframe1:(CCBKey
     {
         return [CCBRotateTo actionWithDuration:duration angle:[kf1.value floatValue]];
     }
-    else if ([name isEqualToString:@"rotationX"])
+    else if ([name isEqualToString:@"rotationalSkewX"])
     {
         return [CCBRotateXTo actionWithDuration:duration angle:[kf1.value floatValue]];
     }
-    else if ([name isEqualToString:@"rotationY"])
+    else if ([name isEqualToString:@"rotationalSkewY"])
     {
         return [CCBRotateYTo actionWithDuration:duration angle:[kf1.value floatValue]];
     }

cocos2d/CCNode.m

@@ -236,7 +236,7 @@ -(float) rotation
 	if(body){
 		return -CC_RADIANS_TO_DEGREES(body.absoluteRadians) + NodeToPhysicsRotation(self.parent);
 	} else {
-		NSAssert( _rotationalSkewX == _rotationalSkewY, @"CCNode#rotation. RotationX != RotationY. Don't know which one to return");
+		NSAssert( _rotationalSkewX == _rotationalSkewY, @"CCNode#rotation. rotationalSkewX != rotationalSkewY. Don't know which one to return");
 		return _rotationalSkewX;
 	}
 }