Move account root to ih (#465)

cmd/hack/hack.go

cmd/migrate/migrate_test.go

cmd/prometheus/Readme.md

cmd/restapi/apis/remote_reader.go

cmd/rpctest/proofs.go

cmd/state/stateless/contract_size_estimage.go

cmd/state/stateless/state_snapshot.go

cmd/state/stateless/tokens.go

core/rawdb/accessors_account.go

core/state/database.go

core/state/database_test.go

core/state/db_state_writer.go

core/state/dump.go

core/state/history_test.go

core/state/intermediate_hashes.go

core/state/readonly.go

core/state/trace.go

core/types/accounts/account.go

core/types/accounts/account_test.go

ethdb/bolt_db.go