Playlist system creation

Added a way to deal with playlist. Also now autoscroll to keep new playing kara on top. Fixed wrong command name

common/lkt.js

@@ -292,8 +292,9 @@ class LktClient {
                         else{
                             karaList.splice(-1);
                         }
-                        if(karaList[0] == "OK") {
-                            client.close();
+                        if(karaList[0]=="OK"){
+			    client.close();
+			    return null;
                         }
                         karaList.forEach(kara => {
                             matches = reg.exec(kara);