Added missing redirects & links to relevant content (#1322)

site/content/integrate/reference/server/server-reference.md

@@ -1,15 +1,18 @@
 ---
-title: Server SDK reference
-heading: "Mattermost Server SDK reference"
+title: Server plugin SDK reference
+heading: "Mattermost Server plugin SDK reference"
 description: "The plugin package is used by Mattermost Server plugins written in Go and enables you to manage and interact with the plugin environment."
 date: 2018-07-10T00:00:00-05:00
 weight: 10
 aliases:
   - /extend/plugins/server/reference/
-  - /integrate/plugins/server/reference/
+  - /integrate/plugins/components/server/reference/
 ---
 
 This is the documentation for the Go <code>github.com/mattermost/mattermost/server/public/plugin</code> package. It can also be found on {{< newtabref href="https://godoc.org/github.com/mattermost/mattermost/server/public/plugin" title="GoDoc" >}}.
+
+Visit the [Plugins]({{< ref "/integrate/plugins" >}}) section to learn more about [developing Mattermost plugins]({{< ref "/integrate/plugins/developer-setup" >}}) and our recommended [developer workflow]({{< ref "/integrate/plugins/developer-workflow" >}}) for Mattermost plugins.
+
 ***
 
 {{<plugingodocs>}}

site/content/integrate/reference/webapp/webapp-reference.md

@@ -1,14 +1,16 @@
 ---
-title: Web app SDK reference
-heading: "Mattermost web app SDK reference"
+title: Web app plugin SDK reference
+heading: "Mattermost web app plugin SDK reference"
 description: "Learn how to implement the PluginClass interface used by the Mattermost web app to initialize and uninitialize your plugin."
 date: 2018-07-10T00:00:00-05:00
 weight: 10
 aliases:
   - /extend/plugins/webapp/reference/
-  - /integrate/plugins/webapp/reference/
+  - /integrate/plugins/components/webapp/reference/
 ---
 
+Visit the [Plugins]({{< ref "/integrate/plugins" >}}) section to learn more about [developing Mattermost plugins]({{< ref "/integrate/plugins/developer-setup" >}}) and our recommended [developer workflow]({{< ref "/integrate/plugins/developer-workflow" >}}) for Mattermost plugins.
+
 ## Table of contents
 
 - [PluginClass](#pluginclass)