Added Logical Device setup, currently there are a few errors thrown because we don't enable any extensions, but DO enable optional features, which rely on those extensions. It seems like vulkan can deal with these errors without crashing, but this will be addressed shortly regardless

src/global.h

@@ -0,0 +1,5 @@
+#pragma once
+#include <iostream>
+#include <vector>
+
+extern const std::vector<const char*> validationLayers;