* replaced copied-from-sdk Vulkan headers with submodule pointing to …

…an official git

* modified code to use proper defines instead of direct values, as well as removing some unused stuff (I might return it back in the future, with the SBTHelper class rework)

* Fixed refraction code (thanks to @sergeyreznik for pointing out)

* Changed ior to ice (better looking)

* increased maximum bounces count to 10 for better refractions (our b…

…unny has complicated shape)

Merge branch 'master' of https://github.com/iOrange/rtxON

Create README.md

+ Added a README file with some build instructions