***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
***LDAP**: Support for nested LDAP Groups, closes [#4401](https://github.com/grafana/grafana/issues/4401), [#3808](https://github.com/grafana/grafana/issues/3808)
***Sessions**: Support for memcached as session storage, closes [#3458](https://github.com/grafana/grafana/issues/3458)
***mysql**: Grafana now supports ssl for mysql, closes [#3584](https://github.com/grafana/grafana/issues/3584)
***snapshot**: Annotations are now included in snapshots, closes [#3635](https://github.com/grafana/grafana/issues/3635)
