fc maintenance

What is a current status of "our" fc? How it compares to: https://github.com/EOSIO/fc (see master and eosio branches) and https://github.com/bitshares/bitshares-fc ( Also maybe @abit can help here )

Any bug fixes / improvements we could benefit from? Potential reduction of maintenance efforts by reducing gaps between Hive / BitShares / EOS versions?