Release init-validator-files

This is a lightweight tool for initialising the validator's state in cloud environments.

$ init-validator-files -h
Usage of init-validator-files:
  -config-dir string
    	Sets the name for config dir (default "config")
  -data-dir string
    	Sets the name for data dir (default "data")
  -node-key-name string
    	Override the validator's node key name (default "node_key.json")
  -root-dir string
    	Sets the root dir for validator's keys (Optional) (default "./validator/")
  -val-key-name string
    	Override the validator's private key name (default "priv_validator_key.json")
  -val-state-name string
    	Override the validator's private state name (default "priv_validator_state.json")