When anchor point is 0,0 , CocosBuilder will not output anchor point param setting request.Although the Scale9Sprite`s anchor point is default to 0, 0, but when calling function "initWithBatchNode", the anchor point will be set to 0.5, 0.5.
Merge pull request #1223 from HoGarfield/Scale9SpriteLoader

To set anchor point to 0,0 when created by loader