add icons for Character groups

www/analytics/plugins/ExamplePlugin/ExamplePlugin.php

@@ -0,0 +1,29 @@
+<?php
+/**
+ * Piwik - Open source web analytics
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+namespace Piwik\Plugins\ExamplePlugin;
+
+/**
+ */
+class ExamplePlugin extends \Piwik\Plugin
+{
+    /**
+     * @see Piwik\Plugin::getListHooksRegistered
+     */
+    public function getListHooksRegistered()
+    {
+        return array(
+            'AssetManager.getJavaScriptFiles' => 'getJsFiles',
+        );
+    }
+
+    public function getJsFiles(&$jsFiles)
+    {
+        $jsFiles[] = 'plugins/ExamplePlugin/javascripts/plugin.js';
+    }
+}