message: Use 1.0 in ray tracing extension except for get_properties helper function
diff: use prelude::*;
  use std::ffi::CStr;
  use std::mem;
  -use version::{DeviceV1_1, InstanceV1_1};
  +use version::{DeviceV1_0, InstanceV1_0, InstanceV1_1};
  use vk;
  use RawPtr;
  @@ -13,7 +13,7 @@ pub struct RayTracing {
  }
  impl RayTracing {
  - pub fn new<I: InstanceV1_1, D: DeviceV1_1>(instance: &I, device: &D) -> RayTracing {
  + pub fn new<I: InstanceV1_0, D: DeviceV1_0>(instance: &I, device: &D) -> RayTracing {
  let ray_tracing_fn = vk::NvRayTracingFn::load(|name| unsafe {
  mem::transmute(instance.get_device_proc_addr(device.handle(), name.as_ptr()))
  });
  