Print user's proper name, not ID.

src/main/java/moe/nekojimi/chords/Main.java

@@ -185,7 +185,7 @@ public class Main extends ListenerAdapter
         try
         {
             Song song = new Song(new URL(arg));
-            song.setRequestedBy(event.getAuthor().getId());
+            song.setRequestedBy(event.getAuthor().getName());
             song.setRequestedIn(event.getChannel().getId());
 //            event.getChannel().sendMessage("Downloading ...").queue();
             downloader.accept(song);