Create library only contains version string.
Extract CLI class.
Fixed twitter gem version.
Extract Bot class.
Refine gem specification.
Merge branch 'feature/separate_exec_and_lib'
Change option name of Twitter config of Bot.
Add CLI option to specify config path.
Add option to load config from environment variables.
Merge branch 'feature/env_config'
Change key of Twitter client configs.
Bump version to 0.4.0