This version is a full rewrite of the Alertmanager with a very different
feature set. Thus, there is no meaningful changelog.
Changes with respect to 0.1.0-beta2:
- [CHANGE] Expose same data structure to templates and webhook
- [ENHANCEMENT] Show generator URL in default templates and web UI
- [ENHANCEMENT] Support for Slack icon_emoji field
- [ENHANCEMENT] Expose incident key to templates and webhook data
- [ENHANCEMENT] Allow markdown in Slack 'text' field
- [BUGFIX] Fixed database locking issue