Preparation for ENS name wrapper

[ladislavdubravsky]

Summary

We started preparing for introduction of ENS Name Wrapper. We setup compilation and deployment to local testchain for the contract. There we get stuck, because the contract bytecode size is too large to be deployed, even with optimizations. Unclear if I'm missing something or ENS needs to make the contract smaller.

Way forward when the bytecode size problem gets fixed:

• write contracts_api for the contract and some tests to play around with it get feel for how it works
• start changing the concept of ownership and transfers in the app to include wrapped domains