* The front-end for each hard-fork, also EIP-160.
* Address EIP161 a/c
* Include EIP-161b
* EIP-161 part d.
* Fix test build.
* Fix one test, add another.
* Fix use of bloom & renaming.
* Initial groundwork for EIP-155
* Fix minor bug.
* Fix all tests finally.
* Rest of EIP-155.
* Add tests for EIP-155 algorithm.
Update transaction tests validation.
* Minor reformat.
* Address grumbles.
* Remove unused code.
* Fix SUICIDE gas mechanism and add consensus tests.
* Remove commented code.
* Set Frontier hardfork block number
* Fix warning.
* Transaction tests,
* no longer export action_params
* remove transaction, header, receipt re-rexports from common
* remove env_info and builtins re-exports from common
* remove everything but util export from common
* replace common usages with util, remove module
* add a prelude module for ethcore-bigint
* bloom crate link
* database layout and outdated tests
* state db alterations
* v10 migration run
* using arc
* bloom migration
* migration fixes and mess
* fix tests
* 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.
* State cache
* Reduced copying data between caches
Whitespace and optional symbols
* Reduced copying data between caches
Whitespace and optional symbols
* Set a limit on storage cache
* Style and docs
* separate block preparation methods
* Split internal sealing from work sealing, add cli option
* replace cli with engine method, simplify
* More docs about sealing types. Bypass work in external txs.
* split requires_reseal, add test and new test miner
