Zero-fee off chain transfers

Dec 5th '19 / Staking Pool updates
We implemented instant zero-fee off-chain transfers at Staking Pool. After successful tests in testnet, you can check at POOL.

And that will allow users to:
- transfer between Staking Pool accounts without any fee and delays;
- staking reward start coming immediately;
- NB: these transactions are not protected by CryptoNote Privacy algos.