Add sample command class by thor.
Add subcommand 'init' for genarate yml file.
Add gem 'pry-debuger'
Add subcommand 'test', for YAML checker.
Change API, for command call.
Add config key, 'bucket_name'
Modified subcommand 'test' for test connection.
Merge branch 'feature/make_cli' into develop
bump up version to '0.1.0'
Merge branch 'release/v0.1.0'