docs(plugins): move plugins into seperate folder

docs/mkdocs.yml

@@ -86,6 +86,8 @@ pages:
 - ['http_api/snapshot.md', 'API', 'Snapshot API']
 - ['http_api/other.md', 'API', 'Other API']
 
+- ['plugins/plugins.md', 'Plugins', 'Plugins']
+
 - ['tutorials/index.md', 'Tutorials', 'Tutorials']
 - ['tutorials/hubot_howto.md', 'Tutorials', 'How To integrate Hubot and Grafana']
 

docs/sources/plugins/installation.md

+---
+page_title: Plugin installation
+page_description: Plugin installation for Grafana
+page_keywords: grafana, plugins, documentation
+---
+
+# Plugins
+
+## Installing plugins
+
+The easiest way to install plugins is by using the CLI tool grafana-cli which is bundled with grafana.
+
+To list available plugins
+```
+grafana-cli list-remove
+```
+
+To install a plugin type
+```
+grafana-cli install <plugin-id>
+```
+
+To list installed plugins
+```
+grafana-cli ls
+```
+
+to upgrade all installed plugins
+```
+grafana-cli upgrade-all
+```

docs/sources/reference/plugins.md

----
-page_title: Plugin guide
-page_description: Plugin guide for Grafana
-page_keywords: grafana, plugins, documentation
----
-
-# Plugins
-
-!Plugin support for panels is only available in nightly!
-
-Adding support for all datasources and suggested panels would bloat grafana and make it impossible to maintain. That's why we implemented a plugin system that makes it possible for anyone to develop support for a datasource or custom panel without adding it to Grafana itself.
-
-## Installing plugins
-
-Installing a plugin is very simple. Just download it and place it in the Grafana plugins folder and restart grafana.
-
-The default plugin folder is configurable under paths.plugins
-
-It's also possible to add one specific plugin by linking to its folder.
-
-```
-[plugin.mirror]
-path = /home/evil-queen/datasource-plugin-mirror
-```
-
-## Plugin implementation ##
-
-Each plugin is defined in plugin.json file in the plugin folder.
-
-Instead of massive documentation about how it works we created a reference implementation of a plugin.
-You can find each reference implementation further down on this page.
-
-## Datasource plugins
-
-Datasource have three responsibilities.
-
- * UI for configuring its settings
- * Datasource object that can send queries, metricqueries and healthcheck the datasource
- * Query editor within panels
-
-https://github.com/grafana/datasource-plugin-genericdatasource
-
-## Panel plugins
-
-Panel plugins are responsible for
-
- * UI for Panel options.
- * Creating a directive that can render something based on datasource data.
-
-We currently dont have a reference implementation for panel plugins but you can checkout https://github.com/grafana/panel-plugin-piechart