closed #2376, Add online IAP feature in plugins : uc, nd91 & qh360.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into develop
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into develop
Add workspace for iOS projects of plugin-x.
Merge pull request #3078 from natural-law/develop

Add online IAP feature in plugins : uc, nd91 & qh360.