perf: WPO/LTCG, fix potential memory leaks, reduce busy-waits, loop opts; general optimizations

Minecraft.Client/EntityRenderDispatcher.h

@@ -1,7 +1,7 @@
 #pragma once
 #include "EntityRenderer.h"
-#include "..\Minecraft.World\Entity.h"
 #include "..\Minecraft.World\JavaIntHash.h"
+class Entity;
 class font;
 using namespace std;
 
@@ -37,6 +37,7 @@ public:
 
 private:
 	EntityRenderDispatcher();
+	~EntityRenderDispatcher();
 
 public:
 	EntityRenderer *getRenderer(eINSTANCEOF e);