Add an example of how to use fb insights api

Author: ouadie-lahdioui

examples/facebook_bot.js

@@ -488,6 +488,11 @@ controller.hears(['send tagged message'], 'message_received', function (bot, mes
     bot.reply(message, taggedMessage);
 });
 
+controller.hears(['insights'], 'message_received', function (bot, message) {
+    controller.api.insights.get_insights(['page_messages_active_threads_unique', 'page_messages_blocked_conversations_unique'], null, null, function (err, body) {
+        bot.reply(message, JSON.stringify(body.data));
+    });
+});
 
 function formatUptime(uptime) {
     var unit = 'second';