port to new adex-protocol-eth

[Ivshti]

instead of using the old adex-core, this repo should use the new adex-protocol-eth contracts: https://github.com/AdExNetwork/adex-protocol-eth

[Ivshti]

Regarding benefits:

• less gas costs
• less transactions needed
• Instead of having users submit stuff on-chain we can have executable signed messages and relay them

But we don’t even need that, timeout and finalize can be called by anyone

IMPORTANT CONSIDERATION: Proofs have to be submitted before the timeout, so we can’t submit them before withdraw; but we can still pick our time depending on gas usage