cleanup: optimize imports, remove unused code, fix warnings

src/main/java/uulm/teamname/marvelous/gamelibrary/gamelogic/GameInstance.java

@@ -45,6 +45,8 @@ public class GameInstance {
 
             result.addAll(result2);
 
+            result.add(GameLogic.buildGameStateEvent(_state));
+
             return Optional.of(result);
         }
 
@@ -102,6 +104,10 @@ public class GameInstance {
         manager.applyEvents(events);
     }
 
+    protected GameState getState() {
+        return _state;
+    }
+
     @Override
     public String toString() {
         StringBuilder sb = new StringBuilder();