***SingleStat**: Implements diff aggregation method for singlestat [#7234](https://github.com/grafana/grafana/issues/7234), thx [@oliverpool](https://github.com/oliverpool)
***Dataproxy**: Added setting to enable more verbose logging in dataproxy [#7209](https://github.com/grafana/grafana/pull/7209), thx [@Ricky-N](https://github.com/Ricky-N)
***Alerting**: Better information about why an alert triggered [#7035](https://github.com/grafana/grafana/issues/7035)
***LINE**: Add LINE as alerting notification channel [#7301](https://github.com/grafana/grafana/pull/7301), thx [#huydx](https://github.com/huydx)
