Draft: Move Ethereum chain client to use shared EVM code
Implements: thorchain/thornode!3150 (merged) thorchain/thornode!3172 (merged) and thorchain/thornode!3334 (merged) and closes #68
Edited by GiMa-Maya
Implements: thorchain/thornode!3150 (merged) thorchain/thornode!3172 (merged) and thorchain/thornode!3334 (merged) and closes #68