Vulkan Tutorial Code uploaded to Github

[KnightMare]

> I just uploaded a working example of Vulkan working in D (With 
> a Hello World triangle) on Github for anyone interested...

about enums:
enum SpvCapability_ { SpvCapabilityMatrix = 0, ... };
// code sample
obj.someCaps = SpvCapability_.SpvCapabilityMatrix;

IMO better/understandable_enough:
enum SpvCapability { Matrix = 0, ... };
// code sample
obj.someCaps = SpvCapability.Matrix;