Guildwatcher

- **Breaking Change:** Dropped support for **Python 3.5**.
- **Breaking Change:** Guild data is now read from `data` folder in the working directory.
- Now announces when a guild has a disbandment warning
- Now announces when guild's applications close or open.
- Added docker support

- Now using YAML instead of json for configuration.
- Now announces guildhall changes.
- Interval between scans is now configurable.
- Removed some configurable values that made the config file more complex.

- GuildWatcher can now detect invites
- Announces when a new character is invited
- Announces when an invite is rejected or revoked.

- Fixed script entry point
- Renamed script to `guildwatcher` for consistency

Initial release
- Announces when members join.
- Announces when members are kicked or leave.
- Announces when members are promoted.
- Announces when members are deleted.
- Announces when members get a name change.
- Announces when members get their title changed.
- Configurable via JSON file.