* Migrate to using Ash as a base
* Small change to test, to make it applicable to Vulkan 1.1
* Auto-generate extensions, check extension requirements
* Add documentation to extensions, use vk.xml from Ash 0.32.1
* Remove `RawDeviceExtensions` and `RawInstanceExtensions`
* Add extension conflict checking
* Small fix
* Add auto-generated features, more requirements checks
* Features documentation
* Macrofy required_if_supported_extensions
* Include vulkano-gen tool
* Move autogen imports to macros
* Change autogen into a build script
* Delete leftover file