* Add support for Expanse.
* Fix build.
* Refactor to be able to alter the eth subprotocol name
* Fix JSON.
* Support exp hardfork.
* Fix exp json again.
* Fixed test
* Fix tests.
* Address renamed to H160 at bigint library level
* moved uint specific test from util to bigint library
* naming
* unifing hashes in progress
* unifing hashes
* cleanup redundant unwraps in tests
* Removing util/crypto in progress.
* fixed compiling
* signature cleanup in progress
* new module - ethcrypto used by ethstore and ethcore-network
* fixed compiling
* fixed compiling
* fixed merge
