Add Analytics integration with MixPanel

lib/Analytics/Reporter.php

@@ -0,0 +1,25 @@
+<?php
+namespace MailPoet\Analytics;
+
+class Reporter {
+
+  private $fields = array(
+    'Plugin Version' => 'pluginVersion',
+  );
+
+  function __construct() {}
+
+  function getData() {
+    $_this = $this;
+
+    $analytics_data = array_map(function($func) use ($_this) {
+      return $_this->$func();
+    }, $this->fields);
+
+    return $analytics_data;
+  }
+
+  private function pluginVersion() {
+    return MAILPOET_VERSION;
+  }
+}