* save state
* walkAsOf by cs test passed
* cs search for plain state
* save state
* fix accounts tests
* refactor walkAsOf account tests
* fix storage test
* refactor walkAsOf storage tests
* fix lint
* fix test
* save state
* save state
* add test with fixed bits
* fmt
* add stages check
* fix lint
* fix lint
* remove obsoleted methods
* introduce PlainStateReader with fallbacks
* no 10.000 changes in tests
* even less iterations
* remove even more iterations
* add `go run ./cmd/geth --syncmode staged --plainstate` flag
* fix serialization calls
* make a more sensible file default
doesn’t affect anything, because this flag is always overriden when parsing CLI. but still.
* 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