Cache love calculator results in RAM

src/main/java/wtf/beatrice/hidekobot/HidekoBot.java

@@ -178,7 +178,7 @@ public class HidekoBot
         }
 
         // start scheduled runnables
-        ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor(); // todo: try-with-resources
+        ScheduledExecutorService scheduler = Cache.getScheduler();
         ExpiredMessageTask expiredMessageTask = new ExpiredMessageTask();
         scheduler.scheduleAtFixedRate(expiredMessageTask, 5, 5, TimeUnit.SECONDS); //every 5 seconds
         HeartBeatTask heartBeatTask = new HeartBeatTask();