Add typed response

For now working with response scan be do via two ways:

```
import feign.Response

@RequestLine("GET /dtos")
public MyDto dtos()

@RequestLine("GET /dtos")
public Response dtos()
```

But what if I need both headers and `MyDto` parsed? I think it is better to have an additional class like `ResponseTyped` which is the same as `Response` but instead of `body` has  `MyDto` parsed.