add getter comments

Author: gabrielecirulli

js/local_storage_manager.js

@@ -39,6 +39,7 @@ LocalStorageManager.prototype.localStorageSupported = function () {
   }
 };
 
+// Best score getters/setters
 LocalStorageManager.prototype.getBestScore = function () {
   return this.storage.getItem(this.bestScoreKey) || 0;
 };
@@ -47,6 +48,7 @@ LocalStorageManager.prototype.setBestScore = function (score) {
   this.storage.setItem(this.bestScoreKey, score);
 };
 
+// Game state getters/setters and clearing
 LocalStorageManager.prototype.getGameState = function () {
   var stateJSON = this.storage.getItem(this.gameStateKey);
   return stateJSON ? JSON.parse(stateJSON) : null;