Eth + Refactor base models out of block and transaction

[micahriggan]

Eth config looks like this

      "ETH": {
        "mainnet": {
          "chainSource": "p2p",
          "trustedPeers": [
            {
              "host": "127.0.0.1",
              "port": 30303
            }
          ],
          "provider": {
            "host": "127.0.0.1",
            "protocol":"http",
            "port": 8545
          }
        }
      }