Post "BRL-CAD Ray Tracing Shaders" tutorial to our wiki
completed by: BrendenD15
mentors: Sean
This is a follow-on to a previously completed GCI task:
http://www.google-melange.com/gci/task/view/google/gci2012/8082205
Your task is to publish the tutorial to our wiki at http://brlcad.org/wiki/Tutorial/Shaders
Be sure to add all images, properly align images to the left/right/center so that the story flows well, and add a link to the tutorial on the main wiki page.