Replaced all references to coin and credits and changed it to free currency and paid currency
Merge branch 'master' of https://github.com/SocialPlay/CloudGoodsSDK

Conflicts:
	Assets/SocialPlay/Plugins/SocialPlaySettings.cs
	Assets/SocialPlay/Scripts/Web/LitJsonFxJsonObjectConverter.cs
	Assets/SocialPlay/Store/CreditPurchase/PurchaseBundles/PaidCurrencyBundleStore.cs