- use fc::app_dir() for platform-independent standard config and data
dir support
- no longer rely on EOSIO_DIR environment variable #2007
- enable short hand for setting contracts/abi by listing contract folder
    ./cleos set contract eosio.token ../../contracts/eosio.token

- fix account history plugin so that it works during replay
- disbled nodeos tests which are broken due to this change in nodes api