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/EntityPos.cpp

@@ -58,5 +58,5 @@ EntityPos *EntityPos::lerp(shared_ptr<Entity> e, float f)
 	{
 		return new EntityPos(yrd, xrd);
 	}
-	return nullptr;
+	return NULL;
 }