Merge pull request #74 from toki78/develop

display works for CPU
Implemented RootbeerGpu.sin quickly to try to get MegaMandel2 working
MegaMandel2 works!
removing output.txt
Fast Matrix Shared (i % 3) passes (with lots of debug output).
updating compile-nemu for MegaMandel
restructing MultiDimRay2 example by Thorsten Kiefer. adding build scripts.
nemu not working
Raytracer running on CPU