Port "Build Sublists" and fix various test cases

- Ported and migrated "Build Sublists" node into "DSCore.List.Sublists"
![sublists](https://f.cloud.github.com/assets/6386550/2385511/c8d55b2c-a91e-11e3-97e4-e7e686cd1beb.png)

- Migrated and fixed various test cases to be able to pass

Feel free to tell me in case the porting was not intended to be like this. I don't mind if you need me to change or revert these commits.