Added relevant docs and changes

CHANGELOG.md

@@ -8,6 +8,7 @@
 * **Prometheus**: Prometheus annotation support, closes[#2883](https://github.com/grafana/grafana/pull/2883)
 * **Cli**: New cli tool for downloading and updating plugins
 * **Annotations**: Annotations can now contain links that can be clicked (you can navigate on to annotation popovers), closes [#1588](https://github.com/grafana/grafana/issues/1588)
+* **Opentsdb**: Opentsdb 2.2 filters support, closes[#3077](https://github.com/grafana/grafana/issues/3077)
 
 ### Breaking changes
 * **Plugin API**: Both datasource and panel plugin api (and plugin.json schema) have been updated, requiring an update to plugins. See [plugin api](https://github.com/grafana/grafana/blob/master/public/app/plugins/plugin_api.md) for more info.

docs/sources/datasources/opentsdb.md

@@ -23,6 +23,7 @@ Name | The data source name, important that this is the same as in Grafana v1.x
 Default | Default data source means that it will be pre-selected for new panels.
 Url | The http protocol, ip and port of you opentsdb server (default port is usually 4242)
 Access | Proxy = access via Grafana backend, Direct = access directory from browser.
+Version | Version = opentsdb version, either <=2.1 or 2.2
 
 ## Query editor
 Open a graph in edit mode by click the title.