2018-05-28 Treeve Jelbert <treeve@sourcemage.org>
	* DETAILS: use zip of repo, as there is no recent tarball.
	  other vulkan spell need vulkan-1.3+

2018-03-08 Treeve Jelbert <treeve@sourcemage.org>
	* DETAILS: version vulkan-1.1-rc2
	  spell created