v0.1.0

Release version 0.1.0

### Added
- Changelog, license, readme.
- Config module for retrieving configuration.
- Module for accessing database.
- Coffeebot Getter module:
    - Basic interface to config, database.
    - Send message to Slack.
- Top 5 Mate drinkers loader.
- Top 5 Mate drinkers runnable.
- Documentation about database, getter, runnables, and systemd timers.