v0.9.2

create setup node script (#76)

* change The latest version is used by default

* add input Upgrade version and data dir

* add change externalHost,producerPrivKey config.yml

1,  install:  add input  externalHost, producerPrivKey config item,
2, Upgrade:  get user old config ( externalHost, producerPrivKey), insert  new config.yaml

* add testnet flag

1, add if one args = testnet run install update testnet ;else mainnet
2,add Key information color prompt

* Update setup_fullnode.sh