* Produce less garbage in GetState
* Still playing with mem allocation in GetCommittedState
* Pass key by pointer in GetState as well
* linter
* Avoid a memory allocation in opSload
* Use uint256.Int rather than common.Hash for storage values to reduce memory allocation in opSload & opSstore
* linter
* linters
* small clean up
* GetCurrentAccountIncarnation
* Incarnation should be read by StateReader, not StateWriter
* Use GetHistoricalAccountIncarnation in DbState
* RemoteReader ReadAccountIncarnation
* Handle the case where a contract has self-destructed, then Eth sent to it, then it got recreated again
* extract functions to different files
* post-rebase fixups
* stage v0
* add a log
* better log entries
* fixes in log messages
* fix some stuff
* review fixes
* fix linters
* pw as a variable
* fix a test
* add Byzantium check
* batch save progress too
* Cutting incarnation out of history and changeset keys
* Rollback the remove of incarnation only in changesets
* Fix linter
* Remove debug printing
* Reinstate encoding of incarnations in the ChangeSets
* Fix linter
* Fix linter
* Fix DefaultIncarnation
* Fixes
* Fix lint
* Fix to history writing
* Fix linter