* ReadBlockByNumber and ReadChainConfig return error
* Let's make rawdb package to return error. But by small steps.
High-level methods need to move first:
ReadBlockByNumber
ReadChainConfig
ReadBlockByHash
ReadHeaderByHash
WriteChainConfig
WriteDatabaseVersion
WriteBlock
DeleteTd
WriteTd
ReadTd
* share config object
* create default config and logger
* move db connection to common func
* move server start to cli package
* clear
* clear
* rename cli to rpc
* use unified SetupLogger func
* make all root flag persistent
* use common flags in different packages
* use common flags in different packages
* move TraceTx method to eth package
* use native slice flags
* create package "turbo"
* disable geth api
* disable geth api
* move more data types to turbo/adapter package
* add support for customApiList
* run more
* run more
* run more
* dog-food
* move DoCall
* move DoCall
* fix tests
* fix test
