Add helper to get the current game state (#3)

src/services/GameState.service.js

@@ -230,6 +230,14 @@ export class GameStateService {
         return(this.get_player_score() / this.get_progress() )
     }
 
+    /**
+     * Get the current game state.
+     * @return {GameState}
+     */
+    get_game_state() {
+        return clone(this.current_state)
+    }
+
     /**
      * responsible for advancing the game state 
      * will be consisting of