Fixed: NGUI Examples
Fixed: premium currency balance not updating after purchase of premium currency
Added: cloud goods settings for item Prefab Initializer
Merge branch 'UnityUI' of https://github.com/SocialPlay/CloudGoodsSDK into UnityUI

Conflicts:
	Assets/CloudGoods/Examples/UnityUI/UnityUIPremiumCurrencyPurchase.unity
	Assets/CloudGoods/Scripts/Item/GetItemsDropper.cs
	Assets/CloudGoods/Scripts/Item/ItemPrefabInitilizer.cs
	Assets/Resources/CloudGoodsSettings.asset