Home Assistant auto discovery & output channels

What's Changed

• Remove unused dependency by @DennisOSRM in #16
• Update README.md with information on Docker images by @DennisOSRM in #18
• Update README.md by @ringelbaer in #19
• Home Assistant Add-on by @dominikandreas in #20
• Upgrade dependencies by @DennisOSRM in #23
• Improved dev environment by @dominikandreas in #31
• Staged docker builds by @dominikandreas in #32
• Create pull_request_template.md by @DennisOSRM in #35
• Feature/ha discovery by @dominikandreas in #27
• Implement output channels by @DennisOSRM in #34
• Prepare v0.2.0 release by @DennisOSRM in #39

New Contributors

• @ringelbaer made their first contribution in #19

Full Changelog: v0.1...v0.2