Fixed/Added: NGUI Dragging functionality to be similar to the UNITY methods
Fixed: Unity item container masking.
Fixed: Item container scene misalignment.
Fixed: Facebook purchasing
Merge branch 'UnityUI' of https://github.com/SocialPlay/CloudGoodsSDK into UnityUI

Conflicts:
	Assets/CloudGoods/Examples/UnityUI/UnityUIPremiumCurrencyPurchase.unity
	Assets/CloudGoods/Examples/UnityUI/UnityUIStore.unity
	Assets/CloudGoods/Prefab/UI/UnityUIItemContainer.prefab
	Assets/NGUI/SDK/Examples/NGUI EquipmentExample.unity
	Assets/Resources/CloudGoodsSettings.asset