feat(plugins): resolve from resources/plugins

* make resources/plugins the first path to search for
  plug-ins
* update plugins stub ship with release
* update plug-in documentation

Closes #597

app/lib/index.js

@@ -381,7 +381,9 @@ app.on('ready', function() {
 
   app.plugins = new Plugins({
     paths: [
+      path.join(app.getPath('userData'), 'resources'),
       app.getPath('userData'),
+      path.join(appPath, 'resources'),
       appPath
     ].concat(app.developmentMode ? [ path.resolve(__dirname + '/../../resources') ] : [])
   });

docs/plugins/README.md

@@ -9,8 +9,8 @@ Plugins allow you to change the appearance and behavior of the Camunda Modeler a
 
 ## Plugging into the Camunda Modeler
 
-You can plug into the modeler in order to change its appearance, add new menu entries or extend the modeling tools for [BPMN](https://github.com/bpmn-io/bpmn-js), [CMMN](https://github.com/bpmn-io/cmmn-js) and [DMN](https://github.com/bpmn-io/dmn-js). Adding a plugin is as easy as putting the files into the directory `{MODELER_LOCATION}/plugins`.
-On macOS, the application searches for plugins in the directory `/Users/{USER_NAME}/Library/Application Support/camunda-modeler/plugins`.
+You can plug into the modeler in order to change its appearance, add new menu entries or extend the modeling tools for [BPMN](https://github.com/bpmn-io/bpmn-js), [CMMN](https://github.com/bpmn-io/cmmn-js) and [DMN](https://github.com/bpmn-io/dmn-js). Adding a plugin is as easy as putting the files into the directory `{MODELER_LOCATION}/resources/plugins`.
+On macOS, the application searches for plugins in the directory `/Users/{USER_NAME}/Library/Application Support/camunda-modeler/resources/plugins`.
 
 So let's dive into how to add your own plugins.
 
@@ -145,13 +145,13 @@ Bundle your plugin:
 npm run build
 ```
 
-Finally, put the folder into the `plugins` directory relative to your Camunda Modeler installation directory. You can now use your plugin!
+Finally, put the folder into the `resources/plugins` directory relative to your Camunda Modeler installation directory. You can now use your plugin!
 
 ### Development Workflow
 
-When creating a plugin you can place the directory containing your plugin in the aforementioned `plugins` directory.
+When creating a plugin you can place the directory containing your plugin in the aforementioned `resources/plugins` directory.
 
-Plugins will be loaded on application startup (menu plugins) or reload (style and modeling tool plugins). To reload the application, open the developer tools F12 and press CtrlOrCmd+R. This will clear all unsaved diagrams!
+Plugins will be loaded on application startup (menu plugins) or reload (style and modeling tool plugins). To reload the application, open the developer tools F12 and press `CtrlOrCmd + R`. This will clear all unsaved diagrams!
 
 ## Additional Resources