These external modules now have their own test coverage and build enforcement. This allowed me to somewhat more easily add good tests around our personalSign strategy (held now in [eth-sig-util](https://github.com/flyswatter/eth-sig-util), and allow each of the keyrings to import that, etc.
removed unnecessary this.query = opts.query from constructor
Created a tx error state for errors in approveTransaction
validateTxParams has been moved to tx-utils
removed "value" arg from _setTxStatus
