Add HTTPS support for cleos when talking to nodeos and keosd. This removes the -H, -P, and --wallet-* options in favor of options that specify the server as an entire URL such as https://server:8888/

- 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

Tidy up http spacing

Makes error message more prominent

- rename eosd to eosiod
- rename eosc to eosioc
- rename eos-walletd to eosio-walletd
- fix wallet plugin
- fix producer plugin
- eosiod will now produce blocks every 500ms
- rename eos_chain to eosio_chain
- move include/eos to include/eosio for various libraries

- added account fetching in CLI
- added currency.abi file describing currency contract's ABI