Fix: missing enums in bindings generator

[tourist1584970446]

Fix for #17

[tourist1584970446]

Not sure what best way is to handle commands that need to be loaded with vkGetDeviceProcAddr.
VulkanNative.LoadFunctionPointers(instance); already exist, but no such thing for devices yet.
Maybe its better to load DeviceFunctions with a separate load call? To load of them with vkGetDeviceProcAddr?

[tourist1584970446]

I have implemented loading device level functions, so now you can use it like this:

after initializing the logical device:
VulkanNative.LoadDeviceFunctionPointers(device);

then you can call:
VulkanNative.vkAcquireFullScreenExclusiveModeEXT(device, swapChain)

whereas before, you would get a NullReferenceException because that function never got loaded properly.
It's only I suggestion. It is also currently how I am using it in my own project.