v2.1.0

This should be a no-op upgrade but this will trigger a restart of Kafka in case you have automatic restarts configured. As always I'd advise to test this in a non-production environment first so that nothing unexpected crops up in production. If it does, please file an issue.

• Allow overriding of UID and GID when creating user / group, #108.
• Bugfix for systemd service on configuration changes, #110.
• Switch to bracket syntax for attributes access, #106.
• Documentation and development fixes, #102, #107, #109.