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/MockedLevelStorage.h

@@ -18,5 +18,5 @@ public:
 	virtual ConsoleSavePath getDataFile(const wstring& id);
 	virtual wstring getLevelId();
 public:
-	virtual ConsoleSaveFile *getSaveFile() { return nullptr; }
+	virtual ConsoleSaveFile *getSaveFile() { return NULL; }
 };