***InfluxDB**: Support for policy selection in query editor, closes [#2018](https://github.com/grafana/grafana/issues/2018)
### Breaking changes
**Plugin API**: Both datasource and panel plugin api (and plugin.json schema) as been updated, requiring a minor update to plugins. See [plugin api](https://github.com/grafana/grafana/blob/master/public/app/plugins/plugin_api.md) for more info.
**InfluxDB 0.8.x** The data source for the old version of influxdb (0.8.x) is no longer included in default builds. Can easily be installed via improved plugin system, closes #3523
**KairosDB** The data source is no longer included in default builds. Can easily be installed via improved plugin system, closes #3524
***Plugin API**: Both datasource and panel plugin api (and plugin.json schema) have been updated, requiring a minor update to plugins. See [plugin api](https://github.com/grafana/grafana/blob/master/public/app/plugins/plugin_api.md) for more info.
***InfluxDB 0.8.x** The data source for the old version of influxdb (0.8.x) is no longer included in default builds, but can easily be installed via improved plugin system, closes [#3523](https://github.com/grafana/grafana/issues/3523)
***KairosDB** The data source is no longer included in default builds, but can easily be installed via improved plugin system, closes [#3524](https://github.com/grafana/grafana/issues/3524)
### Enhancements
***Sessions**: Support for memcached as session storage, closes [#3458](https://github.com/grafana/grafana/pull/3458)
