Revert "Project modernization (#630)"

This code was not tested and breaks in Release builds, reverting to restore
functionality of the nightly. All in-game menus do not work and generating
a world crashes.

This reverts commit a9be52c41a.

Minecraft.World/FurnaceRecipes.cpp

@@ -3,7 +3,7 @@
 #include "Tile.h"
 #include "FurnaceRecipes.h"
 
-FurnaceRecipes *FurnaceRecipes::instance = nullptr;
+FurnaceRecipes *FurnaceRecipes::instance = NULL;
 
 void FurnaceRecipes::staticCtor()
 {
@@ -63,7 +63,7 @@ ItemInstance *FurnaceRecipes::getResult(int itemId)
 	{
 		return it->second;
 	}
-	return nullptr;
+	return NULL;
 }
 
 unordered_map<int, ItemInstance *> *FurnaceRecipes::getRecipies()