Resolve "Playername and sort for viewhs4game"

Closes #55 (closed)

frontend/core/src/com/gameware/game/models/Highscore.java

@@ -2,6 +2,8 @@ package com.gameware.game.models;
 
 import com.badlogic.gdx.utils.Json;
 
+import java.util.Comparator;
+
 public class Highscore {
     private String _id;
     private String gameId;
@@ -57,4 +59,9 @@ public class Highscore {
         return report();
     }
 
+    public static Comparator<Highscore> hsValueComparator = new Comparator<Highscore>() {
+        public int compare(Highscore hs1, Highscore hs2) {
+            return (int) (hs2.getValue() - hs1.getValue());
+        }};
+
 }