Support for ObjC project.

[zyqhi]

Out project use objc as primary language, but when use smart-view-sdk 3.1, some member methods of class (such as Service) cannot found. It should be due to these member methods are not marked as @objc available.

for example the class Service, lots of required methods are missing when call in objc context.

Can you update the library to support ObjC?

Thanks!