Implement ISuperArray interface

```
It would be better that the ISuperObject interface should not depend on 
TSuperArray class, but ISuperArray interface. Patch attached.
```

Original issue reported on code.google.com by `kalin.kr...@gmail.com` on 21 Dec 2011 at 1:55

Attachments:
- [superobject.pas.diff](https://storage.googleapis.com/google-code-attachments/superobject/issue-24/comment-0/superobject.pas.diff)
