wip: guard: run `bundle exec rake test`
wip: social_snippet: add init_config()
wip: social_snippet: add init_logger()
wip: social_snippet: add @input_stream and @output_stream
wip: repository_manager: change constructor args

* to use ::SocialSnippet::SocialSnippet class
wip: social_snippet: rename client => registry_client
wip: social_snippet: test/spec: fix tests
wip: repository_manager: test/spec: fix tests