Decouple the usage of PDT evaluator of chart player.

Assets/Cryville/Crtr/Config/ConfigPanelMaster.cs

@@ -26,7 +26,7 @@ namespace Cryville.Crtr.Config {
 
 		void OnEnable() {
 			try {
-				ChartPlayer.etor = new PdtEvaluator();
+				PdtEvaluator.Instance.Reset();
 				FileInfo file = new FileInfo(
 					Game.GameDataPath + "/rulesets/" + Settings.Default.LoadRuleset
 				);